K3: R-MH2 mic problems
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I've just completed assembly of K3 #688 for a friend. Building it was a
joy, aside from a couple of little screw-ups of mine, and having to compress some turns on one torroid. The support guys are OUTSTANDING at answering questions and providing solutions!!! But they are off for the weekend, so I'm here asking for some help. I have hooked up my trusty Kenwood mic that I use occasionally with my K2 and it works fine from the K3 front panel connector. My friend bought the R-MH2 mic, so I thought I'd set it up, but I am having no luck. Its like I'm getting RF feedback somehow. I've got the menu entry MIC SEL set to FP.H BIAS, and the MIC gain setting set to 10 and CMP set to 0. While in TEST mode (no RF), the ALC bumps up to about 5 bars and my voice sounds more-or-less normal (I'm not used to listening to it) over the MON function. When I go out of TEST at 50w, my voice sounds very distorted and the power output indication on the K3 display doesn't follow my voice but seems to either go high (50w) or very low. Again, all of the above works just fine with my Kenwood mic. The clincher is that if I transmit into a dummy load, the MH2 works fine. Got to be RF feedback, right? Why would it effect the MH2 and not my Kenwood mic? Any suggestions? 73, Randy, KS4L _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Sure sounds like RF getting into the mic circuit but to prove it check to
see if the 'feedback' distortion occurs on 160 meters where, normally, RF is far less intrusive and/or with reduced power output. I use my MH2 with my K3 with Mic Sel set to ' FP.L bias ' because I found that the FP.H setting was providing too much gain in the mic amplifier which caused distortion but that was detectable in the monitor with no RF output. BE SURE TO CHECK TO BE SURE THE SHELL OF THE MIC CONNECTOR is actually grounded. There was a thread recently where some folks were getting RF problems due to excessive paint in the hole which mounted the mic connector which caused an open ground to the shell of the connector. Now that I think about it that sounds like the likliest cause. Don K7FJ > > The clincher is that if I transmit into a dummy load, the MH2 works fine. > Got to be RF feedback, right? Why would it effect the MH2 and not my > Kenwood mic? > > Any suggestions? > > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by wrmoore
The same problem do i have when the cable to the "line in" connector is not rf-blocked (for digi-modes).
Strange.... It IS rf feedback. 73 Michael
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In reply to this post by wrmoore
This is a known problem with the Rev B front panel artwork. I had the exact same problem with a MH2 mike when I first used my K3/100 SN 729 a week ago on 6 meters to contact a local friend who is a well-known VHF and HF DXer and contester. Unfortunately it did not make a good impression! There is a ground trace missing from one end of C98 and C97 on the front panel board. These capacitors are associated with the mike bias circuit. Hence the problem with the MH2. I am told that an official Elecraft fix is going to be released this coming week. Several of us who noticed this problem were given the fix to try and it worked three out of three times. If you must use a mike that needs bias then use the rear panel connector for now (i.e. Elecraft or Icom Proset). MH2s are excluded of course, unless you have an appropriate adapter. 688 is the earliest SN that we know is affected. The other three were 690, 728 and 729. Elecraft is fixing front panel boards now before they ship anymore.
73 Gary, N7IR _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by wrmoore
Well, it might go so far back as SN#671. I'm brand new at this, so I have spent the past 12 hours trying to figure out what I'm doing wrong. My Heil pro-set plus plugged into a kenwood adapter into the front. With RP.H it works fine, FP.H/L As soon as I plug in the stereo headphone part into the adapter the TX light comes on and stays on until I unplug it. It cant even send my voice, just locks everything up. Plugging it into the phones right above, again, it works fine. Is this the problem with the traces or can I just not RTFM?
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In reply to this post by Gary Hembree
Hi I have sn 709 - I have my Heil HC4 from my TS-2000 8 pin conn - when I plug it into the K3 - I hear noise from the MICROPHONE???
The 'manual' says: " to select front or rear panel microphone AND to turn BIAS on/off, use the MAIN:Mic SRC menu entry.. My firmware 1.78 only shows: MIC SEL FP.H b1 A5 and I have not figured out how to adjust it - the main VFO knob also gives me a choice of rP.H and LInE In .. On a separate note - I have this anomaly that I emailed support on Friday night: "Managed to 'lock-up' my K3 - NO buttons work - including power - had to pull the power plug.... going thru the config menu - at PTT-KEY both ' OFF-OFF' tried to change values and complete lockup Completely repeatable - go to config PTT then move main vfo control and lock up. Was on AM 13840 listening to a SW station/ Changed mode/freq - still does it - as soon as main VFO adjusted. " Any advice/help comments? tnxs John VE3NFK
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John:
Go top page 49 [Menu Functions] of the manual (rev c). Read what it says in the Main Menu Table under MIC SEL entry. 73, Ken K3IU ~~~~~~~~~~~~~~~~~~~~~~~~ VE3NFK wrote: > Hi I have sn 709 - I have my Heil HC4 from my TS-2000 8 pin conn - when I > plug it into the K3 - I hear noise from the MICROPHONE??? > > The 'manual' says: " to select front or rear panel microphone AND to turn > BIAS on/off, use the MAIN:Mic SRC menu entry.. > > My firmware 1.78 only shows: MIC SEL FP.H b1 A5 and I have not figured > out how to adjust it - the main VFO knob also gives me a choice of rP.H and > LInE In .. > > On a separate note - I have this anomaly that I emailed support on Friday > night: > > "Managed to 'lock-up' my K3 - NO buttons work - including power - had to > pull the power plug.... > going thru the config menu - at PTT-KEY both ' OFF-OFF' tried to change > values and complete lockup > Completely repeatable - go to config PTT then move main vfo control and > lock up. > Was on AM 13840 listening to a SW station/ > Changed mode/freq - still does it - as soon as main VFO adjusted. " > > Any advice/help comments? > > tnxs > > John VE3NFK > > > > Gary Hembree wrote: > >> This is a known problem with the Rev B front panel artwork. I had the >> exact same problem with a MH2 mike when I first used my K3/100 SN 729 a >> week ago on 6 meters to contact a local friend who is a well-known VHF and >> HF DXer and contester. Unfortunately it did not make a good impression! >> There is a ground trace missing from one end of C98 and C97 on the front >> panel board. These capacitors are associated with the mike bias circuit. >> Hence the problem with the MH2. I am told that an official Elecraft fix >> is going to be released this coming week. Several of us who noticed this >> problem were given the fix to try and it worked three out of three times. >> If you must use a mike that needs bias then use the rear panel connector >> for now (i.e. Elecraft or Icom Proset). MH2s are excluded of course, >> unless you have an appropriate adapter. 688 is the earliest SN that we >> know is affected. The other three were 690, 728 and 729. Elecraft is >> fixing front panel boards now before they ship anymore. >> 73 >> Gary, N7IR >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com >> >> >> > > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by VE3NFK
I'm guessing here - but - it sounds like you might have the "bias" turned on
to the K3 mic connector. Heil HC-4 elements do NOT require bias and putting bias on them will usually (have to file the "usually" caveat here as there may be some strange wiring involved) prevent them from working! Let's try this: 1. Tap - Menu (the display will "probably" show a number "6" on the upper line and "LCD BRT" on the lower line - at least mine always seems to come up that way if enough time has gone by since I used it last). Regardless of what the display "defaults" to, after you have tapped "Menu" do the following: 2. Rotate VFO B knob to until you see: MIC SEL on the LOWER line. The UPPER line will display the current mic settings: 3. If the UPPER line shows something like: FP.H(or L) followed by a space and then the word "bias" you have the bias turned on for the mic input selected (either FP for Front or RP for rear). 4. If the word "bias" shows up, then you do indeed have the bias turned on. 5. If the bias is turned on, then TAP the REV button (it has a red #2 in small print under it) once and the word "bias" will disappear. NOTE: The REV button alternately turns the bias to the mic connector on and off. 6. If the top line now shows something like "FP.H" with nothing following it, you have selected the Front panel mic input (the FP) and have selected "high" gain ( the "H"). You can change from H to L by tapping the A/B button (it has a small red #1) under it. On my both my HC-4 and HC-5 elements, I use the "H" setting and adjust the MIC gain accordingly. If the "bias" is not turned on, then all the above is not going to solve your problem. If this is true, the 8 pin plug on your mic is likely wired in some strange way. Please give it a go and report back. As usual, YMMV. Have fun - ' 73 es gud dxing -- Don N4HH K3 #83 -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of VE3NFK Sent: Sunday, April 27, 2008 3:15 PM To: [hidden email] Subject: Re: Re:[Elecraft] K3: R-MH2 mic problems Hi I have sn 709 - I have my Heil HC4 from my TS-2000 8 pin conn - when I plug it into the K3 - I hear noise from the MICROPHONE??? The 'manual' says: " to select front or rear panel microphone AND to turn BIAS on/off, use the MAIN:Mic SRC menu entry.. My firmware 1.78 only shows: MIC SEL FP.H b1 A5 and I have not figured out how to adjust it - the main VFO knob also gives me a choice of rP.H and LInE In .. On a separate note - I have this anomaly that I emailed support on Friday night: "Managed to 'lock-up' my K3 - NO buttons work - including power - had to pull the power plug.... going thru the config menu - at PTT-KEY both ' OFF-OFF' tried to change values and complete lockup Completely repeatable - go to config PTT then move main vfo control and lock up. Was on AM 13840 listening to a SW station/ Changed mode/freq - still does it - as soon as main VFO adjusted. " Any advice/help comments? tnxs John VE3NFK Gary Hembree wrote: > > This is a known problem with the Rev B front panel artwork. I had the > exact same problem with a MH2 mike when I first used my K3/100 SN 729 a > week ago on 6 meters to contact a local friend who is a well-known VHF and > HF DXer and contester. Unfortunately it did not make a good impression! > There is a ground trace missing from one end of C98 and C97 on the front > panel board. These capacitors are associated with the mike bias circuit. > Hence the problem with the MH2. I am told that an official Elecraft fix > is going to be released this coming week. Several of us who noticed this > problem were given the fix to try and it worked three out of three times. > If you must use a mike that needs bias then use the rear panel connector > for now (i.e. Elecraft or Icom Proset). MH2s are excluded of course, > unless you have an appropriate adapter. 688 is the earliest SN that we > know is affected. The other three were 690, 728 and 729. Elecraft is > fixing front panel boards now before they ship anymore. > 73 > Gary, N7IR > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > -- View this message in context: http://www.nabble.com/K3%3A-R-MH2-mic-problems-tp16917192p16927355.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 269.23.5/1400 - Release Date: 4/27/2008 9:39 AM _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by VE3NFK
Thanks to Ken and Don - mic is working great - appreciate the extremely rapid replies guys! (a case of missing something in the manual) 73 John VE3NFK PS - what about the second 'weird behaviour'?
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Re: Thanks! was :K3: R-MH2 mic problems
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Hi again, John:
I can't figure out what you are doing. I go to CONFIG:PTT-KEY entry; rotate VFO A clockwise and one of five selections can be made... rts-OFF; dtr-OFF; OFF-dts; OFF-dtr; and rts-dtr. Your selection will determine what, if anything, will happen when you assert the rts and/or the dtr on the RS232 port. Do you have a connector attached to the RS232 port on the back? If so, disconnect it and see if you can cause the fault.(Manual, pg 52). 73, Ken K3IU VE3NFK wrote: > > PS - what about the second 'weird behaviour'? > > > VE3NFK wrote: > >> On a separate note - I have this anomaly that I emailed support on Friday >> night: >> >> "Managed to 'lock-up' my K3 - NO buttons work - including power - had to >> pull the power plug.... >> going thru the config menu - at PTT-KEY both ' OFF-OFF' tried to change >> values and complete lockup >> Completely repeatable - go to config PTT then move main vfo control and >> lock up. >> Was on AM 13840 listening to a SW station/ >> Changed mode/freq - still does it - as soon as main VFO adjusted. " >> >> Any advice/help comments? >> >> tnxs >> >> John VE3NFK >> >> >> >> Gary Hembree wrote: >> >>> This is a known problem with the Rev B front panel artwork. I had the >>> exact same problem with a MH2 mike when I first used my K3/100 SN 729 a >>> week ago on 6 meters to contact a local friend who is a well-known VHF >>> and HF DXer and contester. Unfortunately it did not make a good >>> impression! There is a ground trace missing from one end of C98 and C97 >>> on the front panel board. These capacitors are associated with the mike >>> bias circuit. Hence the problem with the MH2. I am told that an >>> official Elecraft fix is going to be released this coming week. Several >>> of us who noticed this problem were given the fix to try and it worked >>> three out of three times. If you must use a mike that needs bias then >>> use the rear panel connector for now (i.e. Elecraft or Icom Proset). >>> MH2s are excluded of course, unless you have an appropriate adapter. 688 >>> is the earliest SN that we know is affected. The other three were 690, >>> 728 and 729. Elecraft is fixing front panel boards now before they ship >>> anymore. >>> 73 >>> Gary, N7IR >>> _______________________________________________ >>> Elecraft mailing list >>> Post to: [hidden email] >>> You must be a subscriber to post to the list. >>> Subscriber Info (Addr. Change, sub, unsub etc.): >>> http://mailman.qth.net/mailman/listinfo/elecraft >>> >>> Help: http://mailman.qth.net/subscribers.htm >>> Elecraft web page: http://www.elecraft.com >>> >>> >>> >> > > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by VE3NFK
Hi John - the front panel message " FP.H b1 A5 " really is FP. (means Front
Panel Mic Connection) H (means "high" sensitivity) and the b1 A5 is just an attempt to write the word "bias" within the limitations of the LCD display! That is b = b, 1 = i, A = a, and 5 = s. You are not the first one to be confused with the b1 A5! This means that you have "bias" turned on and that is why you are hearing a noise from the mic. Turn "bias" off - this is done by tapping either the "1" or the "2" (not in front of radio right now) when you are in this menu mode. You might want to consider updating to the latest firmware. Have fun es gud dxing -- Don N4HH K3/100 #83 -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of VE3NFK Sent: Sunday, April 27, 2008 3:15 PM To: [hidden email] Subject: Re: Re:[Elecraft] K3: R-MH2 mic problems Hi I have sn 709 - I have my Heil HC4 from my TS-2000 8 pin conn - when I plug it into the K3 - I hear noise from the MICROPHONE??? The 'manual' says: " to select front or rear panel microphone AND to turn BIAS on/off, use the MAIN:Mic SRC menu entry.. My firmware 1.78 only shows: MIC SEL FP.H b1 A5 and I have not figured out how to adjust it - the main VFO knob also gives me a choice of rP.H and LInE In .. On a separate note - I have this anomaly that I emailed support on Friday night: "Managed to 'lock-up' my K3 - NO buttons work - including power - had to pull the power plug.... going thru the config menu - at PTT-KEY both ' OFF-OFF' tried to change values and complete lockup Completely repeatable - go to config PTT then move main vfo control and lock up. Was on AM 13840 listening to a SW station/ Changed mode/freq - still does it - as soon as main VFO adjusted. " Any advice/help comments? tnxs John VE3NFK Gary Hembree wrote: > > This is a known problem with the Rev B front panel artwork. I had the > exact same problem with a MH2 mike when I first used my K3/100 SN 729 a > week ago on 6 meters to contact a local friend who is a well-known VHF and > HF DXer and contester. Unfortunately it did not make a good impression! > There is a ground trace missing from one end of C98 and C97 on the front > panel board. These capacitors are associated with the mike bias circuit. > Hence the problem with the MH2. I am told that an official Elecraft fix > is going to be released this coming week. Several of us who noticed this > problem were given the fix to try and it worked three out of three times. > If you must use a mike that needs bias then use the rear panel connector > for now (i.e. Elecraft or Icom Proset). MH2s are excluded of course, > unless you have an appropriate adapter. 688 is the earliest SN that we > know is affected. The other three were 690, 728 and 729. Elecraft is > fixing front panel boards now before they ship anymore. > 73 > Gary, N7IR > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > -- View this message in context: http://www.nabble.com/K3%3A-R-MH2-mic-problems-tp16917192p16927355.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 269.23.5/1400 - Release Date: 4/27/2008 9:39 AM No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.6.5/1619 - Release Date: 8/18/2008 5:39 PM ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Wow - trying to figure out what this was about....
thanks for the reply - you might note my email was from 2008 - over a year ago! \ Cheers John VE3NFK 2009/5/10 Don Nesbitt (via Nabble) <[hidden email]>: > Hi John - the front panel message " FP.H b1 A5 " really is FP. (means Front > Panel Mic Connection) H (means "high" sensitivity) and the b1 A5 is just an > attempt to write the word "bias" within the limitations of the LCD display! > That is b = b, 1 = i, A = a, and 5 = s. You are not the first one to be > confused with the b1 A5! This means that you have "bias" turned on and that > is why you are hearing a noise from the mic. Turn "bias" off - this is done > by tapping either the "1" or the "2" (not in front of radio right now) when > you are in this menu mode. You might want to consider updating to the latest > firmware. > > Have fun es gud dxing -- Don N4HH K3/100 #83 > > -----Original Message----- > From: elecraft-bounces@... > [mailto:elecraft-bounces@...] On Behalf Of VE3NFK > Sent: Sunday, April 27, 2008 3:15 PM > To: elecraft@... > Subject: Re: Re:[Elecraft] K3: R-MH2 mic problems > > > Hi I have sn 709 - I have my Heil HC4 from my TS-2000 8 pin conn - when I > plug it into the K3 - I hear noise from the MICROPHONE??? > > The 'manual' says: " to select front or rear panel microphone AND to turn > BIAS on/off, use the MAIN:Mic SRC menu entry.. > > My firmware 1.78 only shows: MIC SEL FP.H b1 A5 and I have not figured > out how to adjust it - the main VFO knob also gives me a choice of rP.H and > LInE In .. > > On a separate note - I have this anomaly that I emailed support on Friday > night: > > "Managed to 'lock-up' my K3 - NO buttons work - including power - had to > pull the power plug.... > going thru the config menu - at PTT-KEY both ' OFF-OFF' tried to change > values and complete lockup > Completely repeatable - go to config PTT then move main vfo control and > lock up. > Was on AM 13840 listening to a SW station/ > Changed mode/freq - still does it - as soon as main VFO adjusted. " > > Any advice/help comments? > > tnxs > > John VE3NFK > > > > Gary Hembree wrote: >> >> This is a known problem with the Rev B front panel artwork. I had the >> exact same problem with a MH2 mike when I first used my K3/100 SN 729 a >> week ago on 6 meters to contact a local friend who is a well-known VHF and >> HF DXer and contester. Unfortunately it did not make a good impression! >> There is a ground trace missing from one end of C98 and C97 on the front >> panel board. These capacitors are associated with the mike bias circuit. >> Hence the problem with the MH2. I am told that an official Elecraft fix >> is going to be released this coming week. Several of us who noticed this >> problem were given the fix to try and it worked three out of three times. >> If you must use a mike that needs bias then use the rear panel connector >> for now (i.e. Elecraft or Icom Proset). MH2s are excluded of course, >> unless you have an appropriate adapter. 688 is the earliest SN that we >> know is affected. The other three were 690, 728 and 729. Elecraft is >> fixing front panel boards now before they ship anymore. >> 73 >> Gary, N7IR >> _______________________________________________ >> Elecraft mailing list >> Post to: Elecraft@... >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com >> >> > -- > View this message in context: > http://www.nabble.com/K3%3A-R-MH2-mic-problems-tp16917192p16927355.html > Sent from the Elecraft mailing list archive at Nabble.com. > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@... > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.524 / Virus Database: 269.23.5/1400 - Release Date: 4/27/2008 > 9:39 AM > > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.138 / Virus Database: 270.6.5/1619 - Release Date: 8/18/2008 > 5:39 PM > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@... > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > ________________________________ > This email is a reply to your post @ > http://n2.nabble.com/K3%3A-R-MH2-mic-problems-tp466534p2857306.html > You can reply by email or by visting the link above. > > |
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