Hi folks,
I have scanned the article, one small page, written by K0ZQD in V2 Iss.
16 of The Collins Coll's. MMag. It gives the schematic, leaving
construction details to the builder. I also have scanned a skem of the
p.s. pinouts for the 516F-2, from the same issue. Make your own
adapter(s) for various supplies, if wanted. I'll send the scans to
those who have/do request it.
Mike brings up a good point, as written, the voltages are unloaded, and
will be high. I'd like to switch in the load, so a relay for the HV
would be advisable for that. As Mike says, use ohms law for resistor
sizing, and you'll know, close enuf, what the currents will be.
I've used my test rig on a lot of Collins and Drake supplies, it's a
quick test, doesn't show ripple, but ckg ESR on the filter caps will
tell you what you need to do there (do it before you power up the
supply, so the caps don't do any reforming).
Al, W8UT
www.boatanchors.org
www.hammarlund.info
"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole
On 11/27/2012 1:06 PM, Mike Bryce wrote:
There wouldn't be much too it.
all you need would be a hand full of resistors, using ohm's law to calculate
the values. The values would be calculated at the max current the TRx series
would draw.
On would need to load the 6.3 v filament down to the same current as the tubes,
if you don't the unloaded transformer would produce more voltage than normal
since it's not powering the tubes.
a couple of cheap LED digital panel mount meter could be used to monitor the
voltages, plate, screen, and bias
likewise a meter could be used to monitor current on the plate supply. I don't
feel it would be necessary to monitor bias current or screen voltage current
either.
it would be an interesting project, that would make checking the supply quick.
A few test points for an 'oscope to monitor ripple would be icing on the cake
later
mike, wb8vge
On Nov 27, 2012, at 10:21 AM, Eugene Balinski wrote:
I would be very interested in seeing the schematic..
73
Gene K1NR
PS I would not mind having one to check my Collins supply
either : - )
On Mon, 26 Nov 2012 11:50:11 -0500
Al Parker <[email protected]> wrote:
hi folks,
Some yrs ago there was an article on building a test
setup for Collins p.s.'s. I think it was in one of the
Collins collector magazines, I can search it out. I came
into possession of one of the units, and have made cable
adapters for the AC-3/4's, and I think the HP-23's also.
It is for voltage only, and did not include a load test,
but I have been thinking of adding that to mine.
73,
Al, W8UT
www.boatanchors.org
www.hammarlund.info
"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole
On 11/26/2012 11:30 AM, Hudson, John@CalEMA wrote:
That would be a useful test jig.
John N. Hudson III, Communications Coordinator
4050 Taylor St, MS 243
San Diego, CA 92110
6192509063 Cell
On Nov 24, 2012, at 1:37 PM, "Eugene Balinski"
<[email protected]> wrote:
All,
Just wondering if anyone has put together an AC-4
load
or test bank ? If so, could you share the plans ?
I would like something that would allow one to connect
the
AC-4. switch on the AC, and measure the various
voltage
levels on test point, and perhaps even load the
supply.
Thanks in advance,
73 Gene K1NR
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