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Total 130 documents matching your query.

121. Re: [Amps] 8877 - No plate current (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Tue, 10 Oct 2017 19:06:38 +0000 (UTC)
What voltage does your plate voltage meter indicate with no drive? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/a
/archives//html/Amps/2017-10/msg00118.html (6,894 bytes)

122. [Amps] Amplifier for 630 meter band (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Thu, 9 Nov 2017 18:01:17 +0000 (UTC)
I'm starting to think about building a transmitting station for 630 meters next spring. I've filed my UTC request and expect it to be approved. I think it will be much easier to start with an existin
/archives//html/Amps/2017-11/msg00089.html (7,641 bytes)

123. Re: [Amps] Amplifier for 630 meter band (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Fri, 10 Nov 2017 17:35:54 +0000 (UTC)
"U may well have a tough time stuffing parts into a SB-200 chassis. This is where a simple, bigger box would help out. Something like a single 3-400Z / 3-500Z would do the trick, dead simple. Then u
/archives//html/Amps/2017-11/msg00097.html (8,289 bytes)

124. Re: [Amps] Glitch resistor + fuse? (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Mon, 13 Nov 2017 15:48:23 +0000 (UTC)
I had a HV short occur in my SB-220 upstream of the glitch resistor. Someone had installed a fuse in the HV circuit, but it didn't blow. (I haven't looked to see what rating they used.) I wouldn't co
/archives//html/Amps/2017-11/msg00139.html (8,083 bytes)

125. Re: [Amps] amplifier in 1960's QST (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Mon, 4 Dec 2017 20:03:31 +0000 (UTC)
If it's 73 magazine, look here: https://archive.org/details/73-magazine Also look here: http://www.textfiles.com/hamradio/ 73, Cathy N5WVR _______________________________________________ Amps mailing
/archives//html/Amps/2017-12/msg00016.html (7,158 bytes)

126. Re: [Amps] NXP 65V LDMOS 1K80H-1800W (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sun, 24 Dec 2017 19:34:04 +0000 (UTC)
Can it handle continuous 100% duty cycle on MID? This will by my 6M amp / instant on HF / backup HF amp. I plan to limit it 1KW. From the manual : "Note: ATTENTION: Never stress the amplifier with lo
/archives//html/Amps/2017-12/msg00142.html (12,445 bytes)

127. Re: [Amps] NXP 65V LDMOS 1K80H-1800W (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Mon, 25 Dec 2017 15:12:04 +0000 (UTC)
I don't think the demand for amateur amplifiers is high enough to justify many different models or very many manufacturers. We are lucky to have what we have. Realistically, how large can the market
/archives//html/Amps/2017-12/msg00154.html (9,740 bytes)

128. Re: [Amps] Amp for 444 mHz (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Thu, 1 Mar 2018 13:34:32 +0000 (UTC)
One option would be to put the amp in a weatherproof box at the antenna. That way any losses occur in the path from the exciter to the amp, and with reasonable exciter power you can drive the amp to
/archives//html/Amps/2018-03/msg00004.html (7,565 bytes)

129. Re: [Amps] Amp for 444 mHz (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Wed, 7 Mar 2018 17:27:46 +0000 (UTC)
That's one argument for a tube amp; tubes would more more comfortable than SS with that high of a temperature. If 45 watts minus losses won't drive the remote-mounted amp to the power you want, you c
/archives//html/Amps/2018-03/msg00019.html (8,826 bytes)

130. Re: [Amps] titan 425 dimming ect. update (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sat, 24 Mar 2018 16:06:21 +0000 (UTC)
Great idea, Bill. You could then use the external supply with several different amps. The power supply is a significant part of the total cost of a tube amp. REPLY: Unless you have money to burn, I w
/archives//html/Amps/2018-03/msg00065.html (8,724 bytes)

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