On Jun 29, 2005, at 8:11 AM, Phil Clements wrote:
> Hello, Mike,
> Are you running the tube grounded grid?
> If so, the grid pins on the tube socket all need to be strapped to
> chassis
> ground via short straps.
Mike -- If you do this, please measure the grid resonance before and
after the modification. Inquiring minds want to know!
> To improve stability and kill some bad habits,
> especially if you are running over 5 kv on the anode, you need to put
> a 10
> ohm resistor in series with a 25 pf disk ceramic capacitor from each
> filament pin to ground with leads as short as possible. The grid
> current is
> measured from the center-tap of the filament transformer to chassis
> ground
> with your 500 ma meter (B-).
>
> Will need further info to comment more....
>
> (((73)))
> Phil, K5PC
>
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On
> Behalf Of aborg
> Sent: Wednesday, June 29, 2005 6:23 AM
> To: Amps Amps
> Subject: [Amps] Grid Meter Confusion
>
> Hello Amper's,
>
> I added a grid padding resistor too my 4-1000a amp,
> 300ma dc meter too reduce the meter from slamming in
> the corner. I'm confused as too why I now have more
> output power from the amp. I know this sound's
> strange, but this is exactly what has happened in my
> case. This is my first amp project and I am a complete
> neophyte. I have a 500ma dc meter comming to replace
> the 300ma dc meter.
>
> Can someone give a reason for this ?
> 73's
>
> Mike-KK4MS
> a_borg@yahoo.com
>
>
>
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Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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