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Total 4 documents matching your query.

1. [AMPS] Unruly L-7 Amplifier (score: 1): Author: w8cqjeff@ameritech.net (Jeff Weinberg W8CQ); Date: Fri, 5 May 2000 21:55:44 -0500; Hi All, I am currently wrestling with an L-7 amplifier and need some help. I recently rebuilt the power supply and repaired the HV dropping string on the amp and all seemed fine. The amplifier was wo; /archives//html/Amps/2000-05/msg00076.html (8,007 bytes)
2. [AMPS] Unruly L-7 Amplifier (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Sun, 7 May 2000 10:10:38 -0700; Jeff: This really sounds like one of two things to me: (1.) An intermittant Grid-Filament short from one of the 3-500Z. The low drive problem mentioned may be a tipoff that the cathode sees a path to; /archives//html/Amps/2000-05/msg00088.html (9,316 bytes)
3. [AMPS] Unruly L-7 Amplifier (score: 1): Author: w8cqjeff@ameritech.net (Jeff Weinberg W8CQ); Date: Mon, 8 May 2000 17:54:20 -0500; Hello All, Thanks to all who responded with different ideas concerning the L-7 fuse resistor problem. Looks like it was a bad tube. He replaced the tubes and all is OK now. One tube must have had an; /archives//html/Amps/2000-05/msg00111.html (7,243 bytes)
4. [AMPS] Unruly L-7 Amplifier (score: 1): Author: 2@vc.net (measures); Date: Mon, 8 May 2000 22:47:30 -0700; It is my opinion that 3-500Zs can be shorted in two ways. Operation with the anode horizontal for a period of c. 12,000 hours. Intermittent VHF parasitic oscillation. Unless you improved the VHF sta; /archives//html/Amps/2000-05/msg00115.html (7,482 bytes)

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