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Total 15 documents matching your query.

1. [Amps] tetrode push-pull amp schematics (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Wed, 17 Jun 2015 11:41:05 -0700
I am looking for a schematic of a push pull tetrode amp. Any ideas? Thanks, Charlie _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/m
/archives//html/Amps/2015-06/msg00043.html (6,343 bytes)

2. Re: [Amps] tetrode push-pull amp schematics (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Wed, 17 Jun 2015 18:26:49 -0700
Brad et al Thanks for the replies. Lessons learned: 1) A Startpage search is not a Google search!!! 2) This book link is a goldmine: http://www.pmillett.com/tubebooks/technical_books_online.htm 3) I
/archives//html/Amps/2015-06/msg00050.html (10,302 bytes)

3. [Amps] Need a dead 8877 Tube for layout/blower tests (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Sat, 11 Jul 2015 19:31:31 -0700
Hi All I am doing a layout for a 8877 amp. I want to build a smallish form factor desktop unit using an existing "under the desk" power supply. One problem that I want to address in this design is bl
/archives//html/Amps/2015-07/msg00032.html (7,065 bytes)

4. [Amps] SMPS Question (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Tue, 21 Jul 2015 09:16:17 -0700
Along the same vein as Colin, I have an adjustable 0-4kv, 0-2.5Amp SMPS. It has a switch freq of 18 khz. Will this allow to change the Ep, and not retune? If so, why not use more often? Seems like an
/archives//html/Amps/2015-07/msg00074.html (7,102 bytes)

5. [Amps] To short or not to short! ( filament to cathode in a 3CX1500A7?) (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Fri, 4 Sep 2015 13:12:24 -0700
Hi all In reviewing numerous schematics of 3CX1500A7 amps, I have noted the circuit both ways. In addition, some appear to place a choke in the line from transformer (or CV/ C limited SMPS) to filame
/archives//html/Amps/2015-09/msg00016.html (6,935 bytes)

6. [Amps] Amp Component Spacing? (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Mon, 9 Nov 2015 20:04:27 -0800
Hi all Doing a prelim layout of an 887 amp. Assuming adequate airflow, and assuming ½ Dia spacing of air coils, any guides for c1, c2 (both Vac Var) other than proper HV spacing? I am building a comp
/archives//html/Amps/2015-11/msg00045.html (6,940 bytes)

7. [Amps] Amp Layout (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Tue, 10 Nov 2015 10:28:30 -0800
Hi all Doing a preliminary layout of an 887 amp. Assuming adequate airflow, and ½ Diameter spacing of air coils, any guides for c1, c2 (both Vac Var) other than proper HV spacing? I am building a com
/archives//html/Amps/2015-11/msg00050.html (6,731 bytes)

8. [Amps] Measuring Grid Current in GG Amp (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Tue, 10 Nov 2015 18:33:52 -0800
Folks In a GG amp, suggestions on how to measure Grid current WITHOUT the typical semi-floating B-. Using a SMPS. Plate current and Voltage are present as 0-5 volt full scale. 1) Measure Cathode curr
/archives//html/Amps/2015-11/msg00056.html (7,242 bytes)

9. [Amps] Need for bias switch (CW/SSB) (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Mon, 11 Jan 2016 10:16:58 -0800
Folks I am putting a 8877 amp together. I was wondering why some amps have a "CW/SSB" switch. Assuming the power supply can handle cw key down, other than higher efficiency, what other reason could t
/archives//html/Amps/2016-01/msg00001.html (6,504 bytes)

10. [Amps] Power Supply Ripple/Filters (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Sat, 11 Jun 2016 17:43:16 -0700
Folks Laying out a conventional FW Bridge, Cap input PS for a 8877. 3500V, 1 A. My transformer sec 6 ohms. Using Duncan Amps software: http://www.duncanamps.com/psud2/index.html I get large amounts o
/archives//html/Amps/2016-06/msg00033.html (6,957 bytes)

11. [Amps] Estate sale amps (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Mon, 10 Oct 2016 11:38:35 -0700
I am acquiring various amps, etc from an estate. I know most is old stuff: sb-200's, drake l4b, Collins, etc. The fellow had all on racks 18" over bedcenter, left, and right, and used to use nightly
/archives//html/Amps/2016-10/msg00034.html (7,122 bytes)

12. [Amps] 2M W6PO Amp Cavity Zo calculations (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Tue, 21 Nov 2017 18:36:54 -0800
Putting some parts together for a 2M amp. Like the W6PO design. Antennaworks has a nice write up of the design choices in their manual online: http://antennaworks.com/ I have 2 questions. 1) On page
/archives//html/Amps/2017-11/msg00179.html (7,010 bytes)

13. [Amps] bad gs35b wanted (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Thu, 14 Dec 2017 18:15:16 -0800
Greetings I am looking for a used/bad gs35b for layout and exploration of a water cooler out of the anode cooler and dissection. Will pay shipping and copper costs. Thanks, Charlie N6CFH ____________
/archives//html/Amps/2017-12/msg00109.html (6,304 bytes)

14. [Amps] 8877 amp- to ground fil ct or not? (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Tue, 5 Jun 2018 13:08:14 -0700
Folks Asking for current thoughts on grounding the filament CT on 8877. Have seen both ways utilized. How about connecting cathode to one filament lead? Again, have seen it both ways. Insight appreci
/archives//html/Amps/2018-06/msg00010.html (6,472 bytes)

15. [Amps] DIGITAL BARGRAPH DISPLAYS (score: 1)
Author: "Charlie" <charlie@drhabekost.com>
Date: Wed, 13 Feb 2019 09:53:20 -0800
Steve Could oi be WD7S's DS-1? http://home.earthlink.net/~wd7s/ds-1.htm I bought one several years ago, works great. Charlie N6CFH _______________________________________________ Amps mailing list Am
/archives//html/Amps/2019-02/msg00038.html (7,519 bytes)

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