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On Fri, 4/7/17,  <milsurplus-request at mailman.qth.net> wrote:

 Subject: Milsurplus Digest, Vol 156, Issue 20
 To: milsurplus at mailman.qth.net
 Date: Friday, April 7, 2017, 7:11 PM

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 Today's Topics:

    1. Re: FET regulator (MICHAEL
 ST ANGELO)
    2. Re: FET regulator (David
 Stinson)
    3. Bendix RA-1 with ??? (Hubert
 Miller)
    4. Re: Bendix RA-1 with ???
 (Michael Hanz)

 ----------------------------------------------------------------------

 Message: 1
 Date: Fri, 7 Apr 2017 17:20:35 -0400
 (EDT)
 From: MICHAEL ST ANGELO <mstangelo at comcast.net>
 To: Hubert Miller <Kargo_cult at msn.com>,
 milsurplus at mailman.qth.net
 Subject: Re: [Milsurplus] FET
 regulator
 Message-ID: <223187755.4071.1491600035935 at connect.xfinity.com>
 Content-Type: text/plain;
 charset=UTF-8

 The newer high speed FETS have lower
 input capacitance that their predecessors. If it is a single
 band tramsmitter you can use a matching circuit for the
 input. It would be tough for a broadband amp.

 I kinda remember an article in
 Electronics Illustrated using rectified and filtered line
 voltage without a transfomrer. It didn't put out much power
 because of the limited dissipation of the transistors.

 Mike N2MS

 > On April 7, 2017 at 5:10 PM Hubert
 Miller <Kargo_cult at msn.com>
 wrote:
 > 
 > 
 > Understood. I think those use
 a  low impedance drive circuit. What i am asking about
 is the practicality of a single power FET transmitter, using
 one of the
 > HF FETs so for example, it could
 use a B+ around line voltage. 
 > 
 > -----Original Message-----
 > From: MICHAEL ST ANGELO [mailto:mstangelo at comcast.net]

 > Sent: Friday, April 7, 2017 2:03
 PM
 > To: Hubert Miller <Kargo_cult at msn.com>;
 milsurplus at mailman.qth.net
 > Subject: Re: [Milsurplus] FET
 regulator
 > 
 > They have been using inexpensive
 FETSs for HF amplifiers for years. There are lots of 24-28
 volt designs based on the IRF-510 that output 40 watt
 puch-pull.
 > 
 > Mike N2MS
 > 
 > 
 > > On April 7, 2017 at 4:43 PM
 Hubert Miller <Kargo_cult at msn.com>
 wrote:
 > > 
 > > 
 > > Could such HV FETs be used in
 a simple transmitter, similar to the one-tube transmitters
 of the past?
 > > I mean, allowing for a good
 safety ratio to B+ and allowing for high SWR.
 > > 
 > > I recall an 'Electronics
 Illustrated' article from 1960 something that 
 > > showed a transistor
 transmitter which was an analog of the single tube 
 > > novice transmitters such as
 the Ameco AC-1 and such. It used two HV 
 > > transistors in parallel at
 175 volts for an input of 17 watts. It occurred to me that
 maybe these HV FETs have input capacitance that makes them
 impractical for this use.
 > > -H
 > >
 ______________________________________________________________
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 ------------------------------

 Message: 2
 Date: Fri, 7 Apr 2017 17:17:51 -0500
 From: "David Stinson" <arc5 at ix.netcom.com>
 To: <milsurplus at mailman.qth.net>
 Subject: Re: [Milsurplus] FET
 regulator
 Message-ID: <9C476B3DF34C42A4A0FD845EA1C17E16 at DaddyPC>
 Content-Type: text/plain;
 format=flowed; charset="iso-8859-1";
     reply-type=original

 New ones are getting much better.
 C2M0045170D will take 1700 V at 48
 Amps.
 Combined Delay-Rise-Fall times only 150
 nS,
 which means it can be driven to better
 than 6 MHz.
 Input cap. is about .004 uFd.- you'll
 probably 
 need one of the little Gate
 drivers.  But you 
 could do it.

 ------------------------------

 Message: 3
 Date: Fri, 7 Apr 2017 22:54:53 +0000
 From: Hubert Miller <Kargo_cult at msn.com>
 To: "milsurplus at mailman.qth.net"
 <milsurplus at mailman.qth.net>
 Subject: [Milsurplus] Bendix RA-1 with
 ???
 Message-ID:
     <DM3PR14MB0784F4FED9F46676E0942E74E40C0 at DM3PR14MB0784.namprd14.prod.outlook.com>

 Content-Type: text/plain;
 charset="us-ascii"

 Bendix RA-1 receiver, we know it was
 standard paired with TA2J24 transmitter. Were there any
 others?
 I have the receiver, but i'm thinking i
 should only keep it if i can come up with a reasonable, not
 totally
 fantasy pairing transmitter. Also i am
 really not interested in the TA2J transmitter. ( Not that
 it's seen
 offered, anyway. )
 -Hue
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 ------------------------------

 Message: 4
 Date: Fri, 7 Apr 2017 19:11:18 -0400
 From: Michael Hanz <aaf-radio-1 at aafradio.org>
 To: Hubert Miller <Kargo_cult at msn.com>,
 milsurplus at mailman.qth.net
 Subject: Re: [Milsurplus] Bendix RA-1
 with ???
 Message-ID: <8894ab71-e1aa-c509-1bdb-f68572785925 at aafradio.org>
 Content-Type: text/plain;
 charset="windows-1252"; Format="flowed"

 I've seen it paired with the GP-7 in a
 few Navy aircraft, Hue.  I can't 
 think of another military combination,
 though.
   - Mike

 On 4/7/2017 6:54 PM, Hubert Miller
 wrote:
 >
 > Bendix RA-1 receiver, we know it
 was standard paired with TA2J24 
 > transmitter. Were there any
 others?
 > I have the receiver, but i?m
 thinking i should only keep it if i can 
 > come up with a reasonable, not
 totally
 >
 > fantasy pairing transmitter. Also
 i am really not interested in the 
 > TA2J transmitter. ( Not that it?s
 seen
 >
 > offered, anyway. )
 >
 > -Hue
 >

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 End of Milsurplus Digest, Vol 156,
 Issue 20
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