K3: Heil PR20 Microphone
Locked
 
|
I purchased a Heil PR20 microphone after comparing sound quality with
several other options. To my ear, it had a nice combination of clarity and fullness. However, I am getting relatively low output from the mic and consequently low drive to the K3/100. With the microphone configuration on "hi" and with gain advanced fully (60), I have to speak fairly loudly to drive the K3 to 60 watts measured on an LP100 wattmeter. Power output on CW is the full 100w plus a little. I could design a small pre-amp stage to boost the gain, but am wondering if I am overlooking something (or is it common to use a pre-amp for this type of mic?) Howard W1WF ______________________________________________________________ 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 |
|
|
Howard,
I am using a PR20 and am able to run my mic gain at about 20. I use it on the FP set on H and the onboard preamp turned on ( press 7 ) BTW, I have tried several mics and use the Yamaha CM500 for DX'ing but for rag chewing the PR20 consistently generates the best reports. Rick K6LE On 9/13/2011, at 7:03 , Howard Ashcraft wrote: > I purchased a Heil PR20 microphone after comparing sound quality with > several other options. To my ear, it had a nice combination of clarity and > fullness. However, I am getting relatively low output from the mic and > consequently low drive to the K3/100. With the microphone configuration on > "hi" and with gain advanced fully (60), I have to speak fairly loudly to > drive the K3 to 60 watts measured on an LP100 wattmeter. Power output on CW > is the full 100w plus a little. I could design a small pre-amp stage to > boost the gain, but am wondering if I am overlooking something (or is it > common to use a pre-amp for this type of mic?) Howard W1WF ______________________________________________________________ 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 |
|
|
In reply to this post by Howard Ashcraft-2
I'm also using the PR20. FP:H, Mic Gain to 31, Cmp to 18, and I
consistently get good audio reports rag chewing or DX. 73, Dennis NJ6G On 9/13/2011 7:03 AM, Howard Ashcraft wrote: > I purchased a Heil PR20 microphone after comparing sound quality with > several other options. To my ear, it had a nice combination of clarity and > fullness. However, I am getting relatively low output from the mic and > consequently low drive to the K3/100. ______________________________________________________________ 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 |
|
|
In reply to this post by Howard Ashcraft-2
Sent from my LG phone Rick Prather <[hidden email]> wrote: >Howard, > >I am using a PR20 and am able to run my mic gain at about 20. > >I use it on the FP set on H and the onboard preamp turned on ( press 7 ) > >BTW, I have tried several mics and use the Yamaha CM500 for DX'ing but for rag chewing the PR20 consistently generates the best reports. > >Rick >K6LE > >On 9/13/2011, at 7:03 , Howard Ashcraft wrote: > >> I purchased a Heil PR20 microphone after comparing sound quality with >> several other options. To my ear, it had a nice combination of clarity and >> fullness. However, I am getting relatively low output from the mic and >> consequently low drive to the K3/100. With the microphone configuration on >> "hi" and with gain advanced fully (60), I have to speak fairly loudly to >> drive the K3 to 60 watts measured on an LP100 wattmeter. Power output on CW >> is the full 100w plus a little. I could design a small pre-amp stage to >> boost the gain, but am wondering if I am overlooking something (or is it >> common to use a pre-amp for this type of mic?) Howard W1WF >______________________________________________________________ >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 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 |
|
|
Are you running the mic into the rear panel? If so, check your wiring. I ran into this problem. You will need either jumper shield and ground or reverse the two wires as the 1/8" mic jack is mono, not stereo.
73, Jim W5QM ________________________________ ______________________________________________________________ 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 |
|
|
Jim,
The rear mic jack itself is stereo, but the signal path is mono - which means only the tip and shell are connected in the jack (no connection to the ring). OTOH, if the mic plug is stereo and connects only to tip and ring instead of tip and shell, then there will be no connection for one of the plug wires. 73, Don W3FPR On 9/13/2011 1:28 PM, Jim Hoge wrote: > Are you running the mic into the rear panel? If so, check your wiring. I ran into this problem. You will need either jumper shield and ground or reverse the two wires as the 1/8" mic jack is mono, not stereo. > > 73, Jim W5QM > ______________________________________________________________ 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 |
|
|
In reply to this post by Howard Ashcraft-2
Howard,
The problem may be your microphone cable wiring. I will try to cover the three possible cases I know about for connecting a balanced mic to an unbalanced input. The Heil PR20 microphone uses an XLR connector to connect to the mic cord - two balanced wires on pins 2 and 3 plus the shield on pin 1 (standard wiring for pro-audio). How are you connecting the two wires to the K3? One of the wires must connect to ground and the other to the AF input. If you are using the front connector, one of the two wires connects to pin 1 and both the shield and the other wire connects to ground (pins 7 and 8). If you are using the K3 rear connector and you have wired your own plug, one of the wires must connect to the tip of the plug and both the other wire and the shield must connect to the shell. If it is a stereo plug, nothing is connected to the ring. If your mic cable has a 1/4 inch TRS plug on one end (a common pro-audio cable), and you used a 1/4 to 1/8 inch stereo adapter, it will likely not work (out of the box). Open the adapter (or the mic cable plug) and connect the ring to the sleeve. If you used a 1/4 inch stereo to 1/8 inch mono adapter, then it is wired wrong for your application - both sides of the mic element wires are connected together in the typical stereo to mono adapter, and will not work. In other words, the K3 wants unbalanced AF input and your microphone is for balanced operation. 73, Don W3FPR On 9/13/2011 10:03 AM, Howard Ashcraft wrote: > I purchased a Heil PR20 microphone after comparing sound quality with > several other options. To my ear, it had a nice combination of clarity and > fullness. However, I am getting relatively low output from the mic and > consequently low drive to the K3/100. With the microphone configuration on > "hi" and with gain advanced fully (60), I have to speak fairly loudly to > drive the K3 to 60 watts measured on an LP100 wattmeter. Power output on CW > is the full 100w plus a little. I could design a small pre-amp stage to > boost the gain, but am wondering if I am overlooking something (or is it > common to use a pre-amp for this type of mic?) Howard W1WF > 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 |
|
|
In reply to this post by Dennis Moore
On 9/13/2011 8:17 AM, Dennis Moore wrote:
> I'm also using the PR20. FP:H, Mic Gain to 31, Cmp to 18, and I > consistently get good audio reports rag chewing or DX. Didn't mention, for my front panel connection I'm using the CC-1-K Kenwood cable. You don't mention how you have yours connected. 73, Dennis NJ6G ______________________________________________________________ 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 |
«
Return to [K3]
|
1 view|%1 views
| Free forum by Nabble | Edit this page |