- 1. [Amps] water cooled tubes (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Wed, 9 Feb 2011 03:42:08 -0800 (PST)
- Anybody out there have any experience with big water cooled triodes? i can get a new one from an fm transmitter for free. I have built 4-1000 amps, but no experience with something this big. 73 ab3
- /archives//html/Amps/2011-02/msg00059.html (6,629 bytes)
- 2. [Amps] big old plate transformer (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Thu, 14 Apr 2011 17:24:41 -0700 (PDT)
- Kenyon model s13342. dual primary, center tap sec. 1400-0-1400. any idea if it is O.K. to use this at full voltage (2800) in a full wave bridge power supply? If I had to guess, I would say this t
- /archives//html/Amps/2011-04/msg00437.html (6,818 bytes)
- 3. [Amps] What's wrong here- dropping resistor for DC meter? (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Sat, 9 Jul 2011 05:06:05 -0700 (PDT)
- Want to meter HV out. Power supply variable from 0 through 4.5 kv dc Have 1 through 5 v DC movement. I built dropping resistor string to multiply meter by 1000X. Meter now has a non-linear respon
- /archives//html/Amps/2011-07/msg00075.html (7,785 bytes)
- 4. [Amps] water cooled triodes (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Mon, 8 Aug 2011 20:20:37 -0700 (PDT)
- I have seen a few yu-191's available lately, anyone have experience with them? 73 _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/m
- /archives//html/Amps/2011-08/msg00037.html (6,321 bytes)
- 5. [Amps] 3cx3000a1 (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Sat, 20 Aug 2011 07:57:37 -0700 (PDT)
- Any ideas if the a1 variant can be used in amateur service? I picked p one of these along with two a7's. When was the last time a grid driven linear was made from one of these a1's? Worth trying?
- /archives//html/Amps/2011-08/msg00103.html (6,412 bytes)
- 6. [Amps] 4-1000a GG conversion (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Tue, 30 Aug 2011 17:02:08 -0700 (PDT)
- A few ideas to share. I have a triode connected amp, built this 25 years ago, makes 1100-1300 watts out, with 100w drive,& 4kv on the plate. I am considering building bias and screen supplies, and
- /archives//html/Amps/2011-08/msg00222.html (7,094 bytes)
- 7. [Amps] some more tetrode questions (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Tue, 13 Sep 2011 20:37:08 -0700 (PDT)
- A few weeks back I asked about reconnecting a 4-1000.... Currently the amp is connected GG, both the screen and the grid strapped directly to the chassis. Many differing viewpoints were offered on h
- /archives//html/Amps/2011-09/msg00076.html (7,204 bytes)
- 8. Re: [Amps] Relay suggestions please (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Fri, 9 Mar 2012 04:18:22 -0800 (PST)
- Steve, you might want to take a look at the PCB relays used by Inrad in their antenna switches. IIRC, they have been tested to 1.5 KW continuous, 30 MHz and at 3:1 load SWR, and the last time I boug
- /archives//html/Amps/2012-03/msg00069.html (8,611 bytes)
- 9. Re: [Amps] 6kW coax? (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Fri, 9 Mar 2012 14:08:59 -0800 (PST)
- Commscope 1125 is what comes to mind,check it out. Question for the brain trust. I am looking for a cable (possibly made in teflon or not...) with impedance around 70-75 Ohms that supports 6kW, this
- /archives//html/Amps/2012-03/msg00095.html (7,663 bytes)
- 10. Re: [Amps] 6kW Coax (score: 1)
- Author: Ed Heimbach <supermechanic18360@yahoo.com>
- Date: Sun, 11 Mar 2012 06:30:54 -0700 (PDT)
- Why all this talk of using 75 ohm cable? At the power level in question, inefficiencies add up quickly. At somewhere in the vicinity of 35 ohms, transmission losses are at a minimum. Am I missing
- /archives//html/Amps/2012-03/msg00119.html (7,720 bytes)
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