[MRCA] T-195 Power Supply Options

[Mike Murray]

Hello Meir, 
Thank you for reminding me. 
I definitely have the older dynamotor.
I had wondered about a pair of tractor, truck, marine, etc. batteries. Glad to hear that works and could be a viable option.

73

Mike
KW4HF


--- On Sat, 10/31/09, Meir WF2U <wf2u at ws19ops.com> wrote:

> From: Meir WF2U <wf2u at ws19ops.com>
> Subject: RE: [MRCA] T-195 Power Supply Options
> To: "'Mike Murray'" <mmurray377 at yahoo.com>, MRCA at mailman.qth.net
> Date: Saturday, October 31, 2009, 5:29 PM
> I use a 28 VD, 35 A Lambda military
> switching supply (no RF interference
> from the supply) to power up my GRC-19 (T-195/R-392). The
> T-195 in this
> setup  has both the HV and LV solid-state inverter
> type power supplies
> inside instead of the older type dynamotors. No startup
> current surge, and
> the 35 A power supply has no problems at all and doesn't
> even get warm after
> hours of operation. On the other hand, my other T-195 which
> has the old
> dynamotors, won't start with a military 28 V 50 A supply, I
> have to connect
> a pair of garden tractor style batteries (in series),
> parallel to the 28 V
> output of the supply, with the voltage adjusted just to
> trickle charge the
> batteries.  This way the T-195 starts up with no
> hesitation and/or groaning
> dynos.
> 
> 73, Meir WF2U
> Landrum, SC
> 
> -----Original Message-----
> From: mrca-bounces at mailman.qth.net
> [mailto:mrca-bounces at mailman.qth.net]
> On
> Behalf Of Mike Murray
> Sent: Saturday, October 31, 2009 5:16 PM
> To: MRCA at mailman.qth.net
> Subject: [MRCA] T-195 Power Supply Options
> 
> OK, guys, second question:
> 
> As some of you know, I recently acquired a AN/GRC-46 with
> "everything except
> the shelter" (as Brown stated it) in VG condition.
> Ted and I took it for a test drive in Gilbert, and I have
> issues with the
> T-195. The R-392 is excellent, though, so I am happy
> already.
> 
> Vic-K0OUX here in town and I are weighing options for a
> power supply to run
> the T-195 and begin our troubleshooting.
> 
> We were wondering how others are running their T-195s and
> what options we
> have.
> 
> We have a 28V 100A power supply and 5 huge caps - 75VDC
> 60,000uF. The PSU is
> switching, however, and we were hoping to limit the surge.
> Possible? Anybody
> know the time constant of the surge?
> 
> What else can I do? 
> 
> I know I need to replicate Ted's awesome supply!
> 
> Thanks again guys!
> 73
> Mike
> KW4HF
> Chapel Hill, NC
> 
> 
> 
>       
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