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Total 6 documents matching your query.

1. [AMPS] Parasitics in a VHF Amplifier? (score: 1): Author: wrt@eskimo.com (Bill Turner); Date: Wed, 27 Aug 1997 00:37:58 GMT; A question about possible VHF parasitic oscillations in a VHF amplifier: Using a grounded-grid 8877 on 50 MHz, with the tube output capacitance serving as the only tank capacitance, is there a need f; /archives//html/Amps/1997-08/msg00189.html (7,977 bytes)
2. [AMPS] Parasitics in a VHF Amplifier? (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 27 Aug 97 01:58:58 -0800; IMO, your analysis is correct, Bill. The difference here is that the anode resonant frequency is not different from the tank resonant frequency. - However, I would be more inclined to put a load C o; /archives//html/Amps/1997-08/msg00194.html (8,507 bytes)
3. [AMPS] Parasitics in a VHF Amplifier? (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Wed, 27 Aug 1997 07:40:18 +0000; To: <amps@contesting.com> There usually isn't even a need at HF with that tube Bill, if the grid is properly grounded. Tubes that use a cone type grid connection and a short grid length, when ground; /archives//html/Amps/1997-08/msg00198.html (10,165 bytes)
4. [AMPS] Parasitics in a VHF Amplifier? (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Wed, 27 Aug 1997 10:00:26 EDT; Although that is a workable solution it may very well not do a good job on harmonics. Actually, it is very easy to Pi Network tune a 8877 on 6M without resorting to mechanical complexity. With an out; /archives//html/Amps/1997-08/msg00200.html (9,877 bytes)
5. [AMPS] Parasitics in a VHF Amplifier? (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Wed, 27 Aug 1997 10:22:27 EDT; On Wed, 27 Aug 1997 07:40:18 +0000 w8jitom@postoffice.worldnet.att.net writes: To: <amps@contesting.com> SNIP I always find a suppressor necessary on the 3-500Z but with the correct one it remains st; /archives//html/Amps/1997-08/msg00201.html (10,039 bytes)
6. [AMPS] Parasitics in a VHF Amplifier? (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 27 Aug 97 08:08:50 -0800; To: <amps@contesting.com> I have a collection of kaput, gold-sputter damaged 8877s, which were removed from amplifiers that use Eimac's grid collet to properly ground the grid. The next time anyone; /archives//html/Amps/1997-08/msg00202.html (9,764 bytes)

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