[MRCA] BC-654 stuff

[J Mcvey]

 The output specs of the PE-103 dynamotor is 500V @0.16 A= 80 watts . The total consumption for the entire radio was 159 watts max.

    On Monday, December 23, 2024 at 09:28:29 AM EST, Christopher Bowne <aj1g at sbcglobal.net> wrote:  
 
 Those power numbers from the TM appear to be total power demand of the set, not final amplifier plate input power.  I believe the actual RF power output from the transmitter is 40 watts, considerably more the nominal 15 watts of the GRC-9.  The 654 uses a pair of direct heater cathode versions of the 807 in parallel, tube number escapes me at the moment . Could also do about 15 watts output on screen modulated AM. I recall seeing least 40 watts out on CW from my 654 the last time I ran it many years ago with a PE-103 dynamotor.
Merry Christmas from Chris AJ1G Stonington CT 
Sent from my iPhone

On Dec 22, 2024, at 18:42, David Craine <david.r.craine at gmail.com> wrote:




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>From TM 11-275 dated April 5, 1943Page 6
Sent from my iPhone

On Dec 22, 2024, at 14:53, J Mcvey via MRCA <mrca at mailman.qth.net> wrote:



Isn't the bc654 40 watts cw?The angry 9 supply probably will be insufficient anyway.May as well go to plan B solid state supply

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  On Sun, Dec 22, 2024 at 2:51 PM, Ray Fantini via MRCA<mrca at mailman.qth.net> wrote:    I am starting work on a couple BC-654 transmitter receivers. Couple questions: first, how are you supposed to pick these things up? No handles or straps, just a couple D rings. Second is does anyone have a spare connector for a GRC-9? I would like to use my GRC-9 AC power supply for running these things but need a cable connector from a GRC-9 in order to build a brake out box to feed the BC-654, if I cannot find one may just build up something with a solid state 500 volt supply. Have the dynamotors for the two of them along with several vibrator packs so unless someone comes up with a cheap connector more than likely won't use the GRC-9 power supply and just a huge twelve volt supply. Just looks like having to spin up the huge dynamotors every time you want to deal with the transmitter would be a real drag.The scope of work on them is to get them working, replace any week capacitors and then modify them to be able to work in the eighty meter CW sub band. Like everything else a video will follow the progress. Ray F/KA3EKH
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