Tnx, Steven -- This is the same kind of neutralizing circuit that
both Gonset and Heath tried in their 4, 811A amplifiers and both
promptly abandoned because it increased VHF squirreliness.
- The gotcha is that there is no way to neutralize an HF amplifier on
the parasitic VHF-resonance in the anode circuit. The only game in
town is to artificially reduce the VHF gain of the tube by decreasing
the VHF-Q of the suppressor.
On Dec 22, 2004, at 7:19 AM, Steven Grant, W4IIV wrote:
it does have a neutralization circuit
?
steven
"R.Measures" <r@somis.org> wrote:
On Dec 21, 2004, at 9:02 PM, larry williamson wrote:
> Sorry I did not say the kind of amp.... It is a AL 572... Only about
8
> months old. I just tonight installed the new 51 ohm resistor and one
> new tube form ameritron. Only tried about a 10 minute chat on 160
and
> it seemed to be ok. I will run it more over the next few days and
see
> what happens. Both times the amp was on standby for about 1 hour and
> it blew when I keyed up within the first 10 seconds. The bad thing
---
> I don't have a lot of knowledge of electronics, just the basics.
Larry -- Does the AL-572 have a neutralization circuit? Tnx
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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