I just recalled I have a GR 583-A Output Power Meter wasting gravity and
if it still works I'll have the answer. If you Google it, you'll see
the one Sphere has for sale. Thanks for all the comments.
Hank
"Scott Dorsey" wrote in message
...
Henry Kolesnik wrote:
Getting old is not recalling the alternatives offered, so I'm a dummy.
I
found the filament xfmr first and tried it but it reduced volume so I
assume my radio which is non-military doesn't have 600 ohms like the
military manual I have. So I guess mine is commercial, either a
SP-200-SX or more likely a SP-210-SX and I think it has a 3.2 ohm
output transformer.
I can't find any info and I wonder if anyone knows for sure on the
commercial models output transformer's impedance.

What is the DC resistance across the output?

If you want to know FOR SURE, put the output on a scope with a 1K pot
in
parallel with it... tune to interchannel noise, and note the location
of
the peaks on the scope. Crank the pot up until the level is exactly
half
of what it was, then measure the value of the pot.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

"Henry Kolesnik" wrote in
message ...
I just recalled I have a GR 583-A Output Power Meter
wasting gravity and if it still works I'll have the answer.
If you Google it, you'll see the one Sphere has for sale.
Thanks for all the comments.
Hank

That will definitely give you the output impedance but
be careful not to overload it. There is something odd about
this. My BC-779 is in storage so I can't make resistance
measurements on the transformer. I think its time to dig it
out though.
I am afraid many people simply don't know what the
Super-Pro is or how good they are.
What part of the world are you in?

--

--
Richard Knoppow
Los Angeles
WB6KBL

Mine's in the trunk from the last hamfest with the power supply
connected so I have to carry both at once, the ps on top.
I'll get to it tomorrow, too many other things today..
I'm in Tulsa, OK
Hank
"Richard Knoppow" wrote in message
m...

"Henry Kolesnik" wrote in message
...
I just recalled I have a GR 583-A Output Power Meter wasting gravity
and if it still works I'll have the answer. If you Google it, you'll
see the one Sphere has for sale. Thanks for all the comments.
Hank

That will definitely give you the output impedance but be careful
not to overload it. There is something odd about this. My BC-779 is in
storage so I can't make resistance measurements on the transformer. I
think its time to dig it out though.
I am afraid many people simply don't know what the Super-Pro is or
how good they are.
What part of the world are you in?

--

--
Richard Knoppow
Los Angeles
WB6KBL

"Henry Kolesnik" wrote in
message ...
Mine's in the trunk from the last hamfest with the power
supply connected so I have to carry both at once, the ps
on top.
I'll get to it tomorrow, too many other things today..
I'm in Tulsa, OK
Hank
"Richard Knoppow" wrote in
message
m...
Too bad, just a little too far for me to drive over and
get it:-)


--

--
Richard Knoppow
Los Angeles
WB6KBL

Neil Sutcliffe was kind enough to send me a manual on his GR 783A which
is a more recent version of my GR 583A Output Impedance Meter. The o/p
xfrmr on my Type O 210 is 10 ohms and I looked inside and saw no
evidence that it was change. I confirmed that the meter works by the
same technique on my Ten Tec SP 325 which is 600 ohms and it measured
600 ohms. The GR 583A is a neat piece of gear, easy as pie to use.

--
Thanks & 73
Hank WD5JFR
"Richard Knoppow" wrote in message
m...

"Henry Kolesnik" wrote in message
...
Mine's in the trunk from the last hamfest with the power supply
connected so I have to carry both at once, the ps on top.
I'll get to it tomorrow, too many other things today..
I'm in Tulsa, OK
Hank
"Richard Knoppow" wrote in message
m...
Too bad, just a little too far for me to drive over and get it:-)


--

--
Richard Knoppow
Los Angeles
WB6KBL