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21. [Amps] RMS-PEP & 2x8877 (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Thu, 7 Nov 2002 18:38:10 EST; I two tone measurements are a must when you measure IMD 73 Peter -- StripMime Report -- processed MIME parts -- multipart/alternative text/plain (text body -- kept) text/html --; /archives//html/Amps/2002-11/msg00114.html (8,127 bytes)
22. [Amps] EIMAC Confusion (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Wed, 13 Nov 2002 09:34:53 EST; Hi Mark, Total device dissipation is never DCV time DCI, that is total consumption (input). The total dissipation is the consumption minus output power, of course this dissipation includes conductor; /archives//html/Amps/2002-11/msg00204.html (7,586 bytes)
23. [Amps] 813 dissp (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Thu, 14 Nov 2002 11:10:52 EST; In einer eMail vom 14.11.02 14:57:29 (MEZ) Mitteleurop=E4ische Zeit schreibt= =20 firson@telkom.net: Hi Firson, You better check your 4-125! In the past my linear with a pair of 4-125 / QB3/300 did 8; /archives//html/Amps/2002-11/msg00224.html (6,805 bytes)
24. [Amps] Output Safety Choke Value (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Fri, 15 Nov 2002 10:58:50 EST; I do not use a choke on the output of my homebrew amps, just a 100k-resistor against static charge and a spark gap (2mm) against short of the coupling capacitor or antenna faults. 73 Peter -- StripMi; /archives//html/Amps/2002-11/msg00254.html (7,301 bytes)
25. [Amps] Hot Switching (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Fri, 15 Nov 2002 11:04:47 EST; In einer eMail vom 15.11.02 15:12:20 (MEZ) Mitteleurop=E4ische Zeit schreibt= =20 mark@sandlabs.com: e interesting to see that Mark, we talk about 1,7nS at 29MHz! At the clubstation we are allowed 2K; /archives//html/Amps/2002-11/msg00255.html (7,865 bytes)
26. [Amps] 4cx350f/j's (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Sun, 17 Nov 2002 11:17:27 EST; I why should thw Filament transformer be smaller? Wattage is slightly higher for the F-type... 73 Peter -- StripMime Report -- processed MIME parts -- multipart/alternative text/plain (text body -- k; /archives//html/Amps/2002-11/msg00290.html (7,762 bytes)
27. [Amps] SELL: OEM Drake L4B Antenna & PlateTune Air Variables (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Thu, 28 Nov 2002 19:50:31 EST; I My experience with the modification of my L-4B amp is that the original tuning capacitor has not sufficient spacing for 4KV anode voltage with 2x 3-500Z at full load. The load capacitor has not eno; /archives//html/Amps/2002-11/msg00392.html (7,741 bytes)
28. [Amps] How light can you make a 500W amplifier? (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Tue, 15 Oct 2002 16:31:44 EDT; The lightest package for 500W out will be an amp with a pair of EL519/PL519 which will do 600W easily. Power supply transformerless with voltage doubler / tripler can be made quite variable for mains; /archives//html/Amps/2002-10/msg00156.html (9,308 bytes)
29. [Amps] How light can you make a 500W amplifier? (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Wed, 16 Oct 2002 17:51:43 EDT; is boosting ones signal like a 500W amp 73 Peter -- StripMime Report -- processed MIME parts -- multipart/alternative text/plain (text body -- kept) text/html --; /archives//html/Amps/2002-10/msg00182.html (8,859 bytes)
30. [Amps] How light can you make a 500W amplifier? (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Thu, 17 Oct 2002 17:20:45 EDT; Science, not folklore. Good signal processing is not just straight clipping though. It's usually a combination of compression and clipping. Sometimes expansion is applied(to boost the weaker voice co; /archives//html/Amps/2002-10/msg00196.html (8,858 bytes)
31. [Amps] How light can you make a 500W amplifier? (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Fri, 18 Oct 2002 14:43:33 EDT; In einer eMail vom 18.10.02 20:23:41 (MEZ) - Mitteleurop. Sommerzeit schreibt tongaloa@alltel.net: if so, your 3db would mean 1000W ACK I am using my Drake twin with Magnum Six speech compressing, an; /archives//html/Amps/2002-10/msg00205.html (8,876 bytes)
32. [Amps] Rebuilding a Collins 30S1 (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Tue, 3 Sep 2002 11:53:40 EDT; Ron, I would not use the original Pi-Net. Mine has been smoked with the 4CX1500B at 3KV 1A input ~ 2 out. The bandswitch is extremely weak and wire diameter even cooled is far too thin. ( thinking of; /archives//html/Amps/2002-09/msg00018.html (6,673 bytes)
33. [Amps] 6A rectifier diode choice (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Wed, 14 Aug 2002 16:19:42 EDT; Conrad, the 1N540x family of rectifier diodes is rated at 3A Ifav, so they will do 6A in a full wave bridge circuit and much more in 6-pulse 3-phase rectifiers which I prefer. However, rating will me; /archives//html/Amps/2002-08/msg00139.html (7,459 bytes)
34. [Amps] Which Amp (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Mon, 26 Aug 2002 14:51:31 EDT; Hi Kevin, Why not switch to a transistorised amp? There a couple on the market in that power range you like to have. Since 1982 I use my Icom IC-2KL and never had any problem. Power is nominell 500W,; /archives//html/Amps/2002-08/msg00279.html (6,973 bytes)
35. [Amps] Re: KW Linear for FT-817 (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Wed, 17 Jul 2002 17:47:28 EDT; This could probably also be done using 4 x 4CX250 or similar tubes in parallel. The ex-DDR KN-1E amplifier using 1 4CX250 as driver and 4x 2CX250 in the final would do it but is very big and noisy...; /archives//html/Amps/2002-07/msg00266.html (7,453 bytes)
36. [Amps] Copper Pi tank coil oxidisation (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Wed, 8 May 2002 11:22:04 EDT; Hi Mark, I built one amplifier with 3x QB5/1750 in 1977 . All coils are copper-tubing 9-12 mm, being dull brown already for a long time. So far I never measured any change in efficieny from the begin; /archives//html/Amps/2002-05/msg00087.html (7,358 bytes)
37. [Amps] 3-400Z Tube Replacement ideas (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Thu, 16 May 2002 17:00:59 EDT; Hi Bill, You could also use tetrodes connected in high=B5 configuration: 4-250 with less power 4-400 RS1002 QB3.5/750 with less power QB4/1100 Strap control-grid with screen and you are ready, gain w; /archives//html/Amps/2002-05/msg00251.html (6,929 bytes)
38. [Amps] 10 mtr.amps (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Thu, 11 Apr 2002 04:36:12 EDT; Hello Carl, Actually I did not understand what you were going to tell us with that mail ... 73 Peter -- StripMime Report -- processed MIME parts -- multipart/alternative text/plain (text body -- kept; /archives//html/Amps/2002-04/msg00304.html (6,376 bytes)
39. [Amps] Useful parts (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Thu, 14 Mar 2002 09:00:41 EST; Hi John, I forgot to post on this reflector as well... Those transformers used in microwave ovens are not useable for linear amplifiers. The voltage will drop considerabely under load, this is by pur; /archives//html/Amps/2002-03/msg00294.html (6,873 bytes)
40. [Amps] Tube socket fitting SK510 - QB5/1750 (score: 1): Author: DF3KV@aol.com (DF3KV@aol.com); Date: Wed, 27 Feb 2002 08:46:57 EST; The QB5/1750 has the same socket as 4-1000 / 3-1000Z = super giant the pins are a little bit bigger in diameter, so the Eimac-Sockets have to be modified a little Original Valvo sockets are still ava; /archives//html/Amps/2002-02/msg00301.html (7,021 bytes)

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