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References: [ +from:km1h@jeremy.qozzy.com: 394 ]

Total 394 documents matching your query.

121. Re: [Amps] Need Zener for 2KD-3 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 3 Feb 2015 15:28:45 -0500
Bill, I need a zener for my 2KD-3. It's a 1N4561. It appears that they are really hard to find and exorbitantly expensive when you do. Power zeners are very much out of fashion. They have a tendency
/archives//html/Amps/2015-02/msg00035.html (10,596 bytes)

122. Re: [Amps] "need zener' (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 3 Feb 2015 15:36:39 -0500
The Heath SB-230 is another using a TO-3 cased zener, Ive used a 1W zener, small transistor and resistor for decades, mid 80's or so, Carl KM1H The problem with the specific part number mentioned is
/archives//html/Amps/2015-02/msg00036.html (9,847 bytes)

123. Re: [Amps] I'm not kidding: TL922 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 5 Feb 2015 08:29:10 -0500
Try disconnecting the fan, turn on and key up for a few seconds while watching dog. Immediately turn off and let cool down. Ive seen fans and blowers create sounds I cant hear but display as mentione
/archives//html/Amps/2015-02/msg00061.html (9,272 bytes)

124. Re: [Amps] Arctic Silver with and without silver (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 5 Feb 2015 10:09:55 -0500
Such as beryllium oxide, just don't sniff it. That's the stuff used for thermally conducted tubes such as the 8873 Carl Not necessarily: some ceramics are extremely thermally conductive. Kim N5OP "Pe
/archives//html/Amps/2015-02/msg00065.html (10,254 bytes)

125. Re: [Amps] I'm not kidding: TL922 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 6 Feb 2015 15:05:22 -0500
One of the things I did to sort of get even with people that got me angry was take a little HB audio oscillator tuned to a bit over 20 kc and a submini speaker and turn it on and watch the reactions.
/archives//html/Amps/2015-02/msg00081.html (11,485 bytes)

126. Re: [Amps] Biasing a Class C modulated final (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 18 Feb 2015 10:01:20 -0500
The original 6L6, which is metal, is not highly prized by the audiophools. The 2E26 is a reduced power choice and goes for pennies. Another interesting and cute choice is the 815. One way around the
/archives//html/Amps/2015-02/msg00108.html (11,672 bytes)

127. Re: [Amps] Pride DX-300 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 18 Feb 2015 19:34:12 -0500
Luckily I have a Clegg Zeus to check them (-; If they put out 100-120W on 6 or 90-100W on 2M they will do fine on HF at full power. Carl KM1H What is the DEAL ???? Single tube 4CX250 selling on Ebay
/archives//html/Amps/2015-02/msg00112.html (7,732 bytes)

128. Re: [Amps] high drive/low output QRO HF-2500 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 19 Feb 2015 20:53:49 -0500
Same problem on all bands? Carl KM1H The K3 that is driving it shows 1.2 or 1.3 to 1 standing wave. Steve On 2/20/2015 00:31 , TexasRF@aol.com wrote: 90W drive; how much reflected? 73, K5GW In a mess
/archives//html/Amps/2015-02/msg00121.html (9,322 bytes)

129. Re: [Amps] Amp Supply LK-500ZB Power Switch (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 23 Feb 2015 17:08:50 -0500
Pull the switch and research the name and model # Carl KM1H If anyone knows where i could pick up a replacement power switch for this amp, would appreciate the lead. It's an SPST rocker switch, fused
/archives//html/Amps/2015-02/msg00127.html (8,562 bytes)

130. Re: [Amps] Clipperton-L band switch (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 23 Feb 2015 19:16:12 -0500
The one from Harbach that has the extra 160M position for the SB-220 Carl KM1H The band switch in my Clipperton-L arced over the other day. Cleaning hasnt fixed the switch so far. Searching didnt pro
/archives//html/Amps/2015-02/msg00128.html (7,678 bytes)

131. Re: [Amps] GS35B Gassy, or Arcing? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 26 Feb 2015 19:26:06 -0500
Run the tube at RF at half the arc over voltage and it may last a long time and even improve. Thats still a decent signal. Carl KM1H -- Original Message -- From: "Mike Waters" <mikewate@gmail.com> To
/archives//html/Amps/2015-02/msg00157.html (11,718 bytes)

132. Re: [Amps] Amps Digest, Vol 146, Issue 27 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 26 Feb 2015 19:40:45 -0500
You maybe expected an advancement in technology? Silly Boy, this is MFJ we are talking about. Carl KM1H Some time ago I was considering a ALS-1300 for my station. Read good reviews of the very first
/archives//html/Amps/2015-02/msg00158.html (10,838 bytes)

133. Re: [Amps] Re GS35B GASSY OR ARCING (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 1 Mar 2015 15:52:59 -0500
So send me the bad one so I can try some experiments. I need some Russian tube experience! Carl KM1H Good news. Dr Alex Gavva is sending me a replacement. He stands behind his tubes and is obviously
/archives//html/Amps/2015-03/msg00003.html (7,867 bytes)

134. Re: [Amps] high drive/low output QRO HF-2500 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 2 Mar 2015 16:28:27 -0500
What about the input VSWR? That amp is notorious for frying input circuits as well as that 40/80/160M toroid coil, especially in high duty cycle modes. Bandswitching a toroid at those impedance trans
/archives//html/Amps/2015-03/msg00007.html (12,895 bytes)

135. Re: [Amps] Clipperton L parasitic suppressor a (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 8 Mar 2015 15:11:15 -0400
Those ancient carbon resistors go well out of tolerance from age and RF. Try your MOX as not all brands are created equal. If they smoke then get the modern Ohmite OY series stocked at Mouser and oth
/archives//html/Amps/2015-03/msg00026.html (9,305 bytes)

136. Re: [Amps] Do 8875's die fast after weakening? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 17 Mar 2015 21:56:45 -0400
The 8873, 8874, and 8875 are all identical internally and just the external anode determines the plate dissipation. The MLA-2500 cooling is adequate for the 1000W CW INPUT the amp was designed for si
/archives//html/Amps/2015-03/msg00040.html (12,414 bytes)

137. Re: [Amps] 8875 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 19 Mar 2015 20:46:20 -0400
A single 3CX800A7 or the 3CPX version is an easier conversion since none of the extreme metal hacking for Russian tubes is needed; the socket and pin outs are identical. Plus the tube is much cleaner
/archives//html/Amps/2015-03/msg00045.html (8,992 bytes)

138. Re: [Amps] Do 8875's die fast after weakening? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 20 Mar 2015 10:15:19 -0400
The 8873, 8874, and 8875 are all identical internally and just the external anode determines the plate dissipation. The MLA-2500 cooling is adequate for the 1000W CW INPUT the amp was designed for si
/archives//html/Amps/2015-03/msg00050.html (9,819 bytes)

139. Re: [Amps] 8875 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 20 Mar 2015 10:17:27 -0400
That price seems to be holding but you DO have to look around a lot. I only look when I have to buy them. Carl -- Original Message -- From: <qrv@kd4e.com> To: "Carl" <km1h@jeremy.qozzy.com> Cc: "Glen
/archives//html/Amps/2015-03/msg00051.html (9,018 bytes)

140. Re: [Amps] Chippewa amplifier (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 27 Mar 2015 08:48:25 -0400
And the SB-1000 has a lighter duty transformer than even the AL-80A. Heath sure didnt like heavy iron in the SB years. Carl KM1H -- Original Message -- From: "BJ" <fxb1982@hotmail.com> To: <jtml@vla.
/archives//html/Amps/2015-03/msg00070.html (10,752 bytes)

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