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 ;)
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
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|
