K2 and Linearamp UK 811
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Hi all,
I am looking to connect my K2 via the above amplifier. The FR connections are obvious, do I simply need to connect the Amp key out on the back of the KPA100 to the PTT on the 811 or am I missing something? Ian -- Ian J Maude G0VGS SysOp GB7MBC DX Cluster Member of RSGB, ARRL, GQRP K2 #4044 _______________________________________________ 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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Ian,
Check the voltage, current and polarity of the 811 amplifier PTT signal and compare those to the rating for the KPA100 maximum ratings. If the 811 amp requirements fall within the ratings of the KPA100 amp keying output, then just connect them together and run. 73, Don W3FPR Ian J Maude wrote: > Hi all, > I am looking to connect my K2 via the above amplifier. The FR > connections are obvious, do I simply need to connect the Amp key out on > the back of the KPA100 to the PTT on the 811 or am I missing something? > > Ian > _______________________________________________ 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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Don Wilhelm wrote:
> Ian, > > Check the voltage, current and polarity of the 811 amplifier PTT > signal and compare those to the rating for the KPA100 maximum > ratings. If the 811 amp requirements fall within the ratings of the > KPA100 amp keying output, then just connect them together and run. OK, well the amplifier instructions simply state that the phono socket (on the 811), when earthed by the transceiver, puts the amplifier into TX mode. The amp does have an ALC socket but I guess I can ignore that. So my question is, when I key the KPA100 via the K2, will the key output send a ground to the amp PTT input? Sorry to sound so thick, I have not dealt with large amps before. 73 Ian > > 73, > Don W3FPR > > Ian J Maude wrote: >> Hi all, >> I am looking to connect my K2 via the above amplifier. The FR >> connections are obvious, do I simply need to connect the Amp key out >> on the back of the KPA100 to the PTT on the 811 or am I missing >> something? >> >> Ian >> > > > -- Ian J Maude G0VGS SysOp GB7MBC DX Cluster Member of RSGB, ARRL, GQRP K2 #4044 _______________________________________________ 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 Ian Maude
Ian, yes it is as simple as that. Phono to phono cable.
Look at page 65 of the KPA100 manual, centre left, you will see J7 and the switching transistor. The main thing is that the amp shouldn't exceed the device's parameters, page 59. 200V DC and 1 amp. Put your DVM across the amp phono socket and measure the open cct voltage, I would guess between 30 and 100v, then put DVM into current mode and measure closed cct current, again maybe around 70-100 mA. (This will obviously switch the amp on.) Off you go and work some DX!! Email me off list if you need more info. 73 Chris G3SJJ Don Wilhelm wrote: Ian, Check the voltage, current and polarity of the 811 amplifier PTT signal and compare those to the rating for the KPA100 maximum ratings. If the 811 amp requirements fall within the ratings of the KPA100 amp keying output, then just connect them together and run. OK, well the amplifier instructions simply state that the phono socket (on the 811), when earthed by the transceiver, puts the amplifier into TX mode. The amp does have an ALC socket but I guess I can ignore that. So my question is, when I key the KPA100 via the K2, will the key output send a ground to the amp PTT input? Sorry to sound so thick, I have not dealt with large amps before. 73 Ian _______________________________________________ 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 Ian Maude
Tom Hammond N0SS wrote:
> Ian: > > Put a voltmeter on the T-R line from the 811 and confirm that you will > key a POSITIVE DC VOLTAGE (less than 200VDC) to ground. Then put an > ammeter across the T-R line (which should KEY the 811 T-R relay) and > measure the CURRENT required to key the 811 T-R RELAY. If it is < 3A > then the T-R (RELAY) output of the KPA100 should handle it without > complaint. Hi Tom and all who responded to my query on this. Thanks to you all for spelling it out in simple terms for me, it is what I needed :-) Chriss, G3SJJ worked with me off list so I understood exactly what I need to do (thanks Chris) and it was precisely what you stated above Tom. For those who might need the info in future, the Linearamp UK 811 has 16v and 190mA at its PTT connection. So, the K2 should work with it perfectly. I will be attempting this today once I have done a little work with the filters to finally get my voice sounding right. This retirement thing is damned hard work but I am finding enough time to get a few things done that I have been promising myself for years :-) Thanks again to you all. 73 Ian -- Ian J Maude G0VGS SysOp GB7MBC DX Cluster Member of RSGB, ARRL, GQRP K2 #4044 _______________________________________________ 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 Chris G3SJJ
Agreed Chrs, I hope the K3 includes an auto character spacing keying option.
I've always used external keyers with my K2 for that reason. One other thing, re band data output. I hope the K3 puts out 4 bit band data, i.e. compatable with most contest loggng programs, FT1000mp etc. 73 Fraser G4BJM _________________________________________________________________ Reserve your place in history - Email Britain! http://www.emailbritain.co.uk/ _______________________________________________ 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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Fraser, look at FAQs, Interfacing, Accessory Connector. Pin Outs are :
Band Data Out Pin 0 13 1 3 2 9 3 14 Cmn 5 I will pre-wire a connector up for that to drive my Topten Band Decoder. I brought a Topten DX Doubler back from my recent W5 trip so looking forward to SO2R with FT1kMP / K3 combo. It's the only way I can compete with you in the FOC Marathon!! (Tree hugging, high power contester. Life's to short for QRP!) 73 Chris G3SJJ Fraser Robertson wrote: > Agreed Chrs, I hope the K3 includes an auto character spacing keying > option. I've always used external keyers with my K2 for that reason. > > One other thing, re band data output. I hope the K3 puts out 4 bit > band data, i.e. compatable with most contest loggng programs, FT1000mp > etc. > > 73 Fraser G4BJM > > _________________________________________________________________ > Reserve your place in history - Email Britain! > http://www.emailbritain.co.uk/ > > 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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