[Amps] TRANS WORLD TW500A-RM

[Steve]

As you were - a direct email from Emile says that his TW500A uses 12V 
transistors and is not simply half a TW1000A.

Steve

On 22/12/16 12:13, Steve wrote:
> You're absolutely right, Dave. I found my manual which is for TW500M not
> TW500A. The TW500M is a 12V mobile amp and appears to be identical to
> Metron 1000B apart from the front panel badge. My apologies for the
> confusion.
>
> I found a manual for Metron 100B on the BAMA site - apart from the brand
> name, it looks word for word, page for page identical to the TW one I have.
>
> Steve
>
>> I think there  is some sort of connection but the Transworld TW1000A and
>> TW500A are totally different beasts than the Metron 1000B if that is what
>> you are referring to.  The TW1000A and TW500A are large, heavy amplifiers
>> built for commercial and government service paired with a Transworld
>> transceiver. The TW series equipment was  found in US consulates
>> worldwide.
>> They would run 24/7 at full output for RTTY or WEFAX.  I loved my TW1000A
>> and its 28 volt 80 amp.  ferro resonant transformer power supply.  I only
>> gave mine to my son in law because I downsized and had no room for the
>> equipment rack although it only took about 1/2 of a 5 foot rack. The back
>> story is that in 2005  bought two of the RF Decks and one 80 amp power
>> supply for $200 in from an ad on the local 75 meter swap net because
>> he said
>> they did not work.  It turned out the power supply was jumpered for
>> 240 volt
>> operation and someone had installed a 120 volt plug on the power
>> cord.  That
>> didn't go over well at all with the ferro resonant power supply.  When I
>> replaced the plug with a 20 amp 240 volt plug I instantly got 1000
>> watts out
>> on all bands with less than 100 watts drive. The second RF deck had blown
>> final transistors and I sent it to Datron for repair.  $900 dollars
>> later I
>> had it back with all eight 125 watt transistors replaced.  I also
>> picked up
>> a surplus Telco 28 volt 40 amp power supply for the second deck but I
>> don't
>> think he has connected it yet but is keeping the second deck and Telco
>> supply as spares since he has room.  The amplifier covers 1.8-30 Mhz
>> continuously with low pass filters switched for a number of frequency
>> banks.
>>
>> Dave W7VM
>>
>> -----Original Message-----
>> From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of qrv at kd4e.com
>> Sent: Wednesday, December 21, 2016 2:09 PM
>> To: amps at contesting.com
>> Subject: Re: [Amps] TRANS WORLD TW500A-RM
>>
>> In the cobwebs of my memory I have a vague notion that the Transworld
>> amp is
>> associated with the Metron amp - is that correct?
>>
>> I have the Metron PDF.
>>
>> David KD4E
>