Do a few on this forum recall when "solid state" was transistorized mobile
power supply, a great leap forward from dynamotors?
I'll let others explain to the younger subscribers of this forum what a
"dynamotor" was if they don't know.
I remember seeing pictures of the radios that used them being installed in the
trunk of `48 Fords and Chevy's with Leece-Nevell (6 v) alternators doing the
REALLY heavy lifting, current wise.
No, I do not want to go back to the good old days, period.
73,
Gary... wa6fgi
ps: I did see an engine cough and die under (too much) load at idle when a 80
watt Motorola low band radio was keyed up on a restored 1948 Ford patrol car.
(I had the job of retuning the radio, nobody else had a Motorola test set. They
had all been tossed out in the junk piles. gms)
----- Original Message -----
From: Steven Grant, W4IIV
To: Richard Measures ; Steve Thompson
Cc: amps@contesting.com
Sent: Thursday, March 31, 2005 3:59 PM
Subject: Re: [Amps] Solid State HF High power linear amps
Be happy they no longer use 6 volt systems. a solid state amp for that would
be a nightmare
Richard Measures <r@somis.org> wrote:
On Mar 28, 2005, at 11:14 PM, Steve Thompson wrote:
> Dr. William J. Schmidt, II wrote:
>> I personally have gravitated towards 2SC2879's, MRF120's, and
>> MRF455's for the car... the 2SC2879's are 14 VDC devices and are
>> super dirt cheap in quantity.... even from a high-buck place like RF
>> Parts.
>>
>> A buddy of mine, K0UM is in the process of building a 48 VDC MRF150
>> amp for his car... using a voltage quadrupler of a simple design (now
>> I say simple, knowing full well he owns a power supply design
>> company). The higher voltage devices have better efficiency.
>
> It's probably not long until 36V car electrics become commonplace.
BMW is reportedly going to 42Volts. This makes much sense for starting
diesel engines and QRO mobiles.
>
> Steve
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> Amps@contesting.com
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>
>
Rich Measures, 805.386.3734, AG6K, www.somis.org
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