On Dec 9, 2004, at 3:37 AM, Tony King wrote:
Rich hasn't mentioned the good meter protection info on his web site:
<http://somis.org/D-amplifiers2.html> topic "Glitch Protection" and
this diagram: <http://somis.org/D_a_02.GIF>.
No use having a good meter staring you in the face that is doing
nothing ;)
On the RF-out position, the multimeter serves a useful function. On
the grid-I position, it doesn't.
73, Tony W4ZT
At 04:05 AM 12/9/2004, R.Measures wrote:
On Dec 8, 2004, at 1:52 PM, kwasny wrote:
I considered but did not want to garbage it up to bad but
considering the
availability of .82 ohm I think that I will use the 12x10 ohms.
A SB-220 amplifier will work just a well with a 0-ohm jumper in place
of R3 and it would tune up the same. . . Or, we sell 0.82-ohm 2w
MF resistors for 20¢. However, the condition that caused the HV+ arc
to ground - which occasionally causes R3 to blow probably should be
addressed -- unless of course you have a free supply of 3-500Zs and
Heath 200uA meter movements.
Darryl - K5WAS
"I would like to get a .82 ohm resister put back in but may test
the amp
with a
jumper. They are mighty scarce around here as are other values. The
only
thing we have in this area are Radioshacks"
If all you have is Radio Shack, 12 x 10 ohm 1/2 watt resistors in
parallel
would be .83 ohms. That would be within the normal tolerance of
resistors
and still be pretty small.
Colin K7FM
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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