Mail Archive Search: <+from:jo1vrk@hayama.net>

Results:

References: [ +from:jo1vrk@hayama.net: 4 ]

Total 4 documents matching your query.

1. [Amps] 4CX350A Cathode Driven HF amp strange symptom (score: 1): Author: Ken Harada <jo1vrk@hayama.net>; Date: Wed, 24 May 2023 21:20:11 +0900; Hi Amp enthusiasts, I am building a HF linear amp with 2 x 4CX350A with cathode driven circuit, but getting a strange symptom. Ep=2000V, Esg=300V (regulated with Zener and FET), Ecg=-50V to -20V (b; /archives//html/Amps/2023-05/msg00019.html (8,276 bytes)
2. Re: [Amps] 4CX350A Cathode Driven HF amp strange symptom (score: 1): Author: Ken Harada <jo1vrk@hayama.net>; Date: Wed, 24 May 2023 21:42:08 +0900; Then my wiring is not good? But I don't hear noise on a receiver beside the amp - though I should watch different frequency to detect... 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5; /archives//html/Amps/2023-05/msg00022.html (9,678 bytes)
3. Re: [Amps] 4CX350A Cathode Driven HF amp strange symptom (score: 1): Author: Ken Harada <jo1vrk@hayama.net>; Date: Thu, 25 May 2023 19:51:21 +0900; I have placed a bleeder resistor to screen grid circuit. Should I do the same for control grid as well? Ken / JO1VRK It the tubes are used, this becomes quite common. One possible remedy is to use l; /archives//html/Amps/2023-05/msg00025.html (9,287 bytes)
4. Re: [Amps] 4CX350A Cathode Driven HF amp strange symptom (score: 1): Author: Ken Harada <jo1vrk@hayama.net>; Date: Tue, 10 Oct 2023 18:06:18 +0900; Hi, It was indeed an oscillation. I have then given up Ground Grid / Cathode driven circuit, and modified it to GK/Grid Driven with input load resistor. It works perfectly fine & stable, with drivi; /archives//html/Amps/2023-10/msg00026.html (10,179 bytes)

Current List: 1 - 4
Page: [1]