[Boatanchors] Solid State Dynamotor thread.

[Carl Nord]

Plus at least one SWL who gave up
Something was wrong with the setup here

But it sure was fun listening to the  WHOOP WA WHOOP WHOOP------- WHOOP
WHOOOP WAAA WHOOP ----------EEE  BAAAA BAAA....BEEWAAA-----BEEEEE WAHAAH 

Sure missed the W2 or 3 whoused to run unfiltered AC on the plate
Carl
WA1KPD
Visit My Boatanchor Collection at
http://home.comcast.net/~chnord/wa1kpd.html

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Revcom
Sent: Wednesday, December 17, 2008 6:13 PM
To: milsurplus at mailman.qth.net
Cc: boatanchors at mailman.qth.net
Subject: [Boatanchors] Solid State Dynamotor thread.


More data...

GE had two styles, one for 30W and  the 60W version. The 60Watters used a 
pair of 6146s. 30W only had -1- and just one toroid in the supply and used 
just -2- switching transistors. 60W had twice as much.  They stacked the 
toroids in the higher power units to get more current.  Relays were a real 
maintenance issue if mobile was used in dusty enviornment, cleaned and 
changed a whole bunch of them.

60W units used the 4EP14-D's 600V/300ma, 330V , 200V and -25V on TX. 
 210V, -25V on RX.
30W units used the 4EP14A and B+  High volts changed to 425V/150ma
If I remember right,  GE had a 100W unit also, Glenn might clarify that, all

different parts.

All those GE supplies were a "can of worms". T/R relay functions and 
stacking, was a mess.

Motorola supplies  were as about as complex but their relay had a dust 
cover, the TU588 was used in
the 50W T power units. They were rated on TX of 705V/120ma, 
275V/60ma/150V/18ma and -36V
On RX was 200V/70ma.

Motorola used -1- 6146 to get 50W on lowband, while GE used -2- 6146's for 
60W.

Motrac used a Transistorized supply also.  It is a man killer, watch out!

So if you find a pile of ProgLines, or T-powers, that's the supplies they 
have. (low band)
Probably a lot of variants, this is from books I have from way back working 
on Highway Patrol units.

Article in  Jan-09 QST on the ARC receiver, author used a small 12V to 120AC

inverter, then used a voltage double/rectifier to get the Rx DC.  Same would

work on any gear, Using a diode/capacitor multiplier, you could get the 
appropriate DC pretty cheap, taking the inverter our of its case and 
repackaging would end up pretty compact. Capacity would depend on inverters 
wattage.

Rod
K0EQH




_______________________________________________