>Rich,
>
>I had the diode on the wrong board. It is on the ps board immediately to the
>right of the big ribbon cable in the pics on this site.
>
>http://hamradiomarket.com/Articles/Ameritron%20AL-800H.htm
>
>I'm not seeing a glitch resistor in these pics. Still might be in there
>somewhere. ?
** MFJ/Ameritron's chief engineer, Mr. Tom Rauch, apparently does not
employ glitch resistors in Ameritron amps. He said there's enough ESR in
the electrolytic capacitors to do the job. Modern electrolytic caps do
not have even one-third the needed R.
>
cheers, Steve
>
>----- Original Message -----
>From: "2" <2@vc.net>
>To: "Steve M" <wmoorejr@cox.net>
>Sent: Saturday, August 24, 2002 5:49 AM
>Subject: Re: [Amps] rocky point effect, barnacle bill
>
>
>> A glitch resistor is in series with the HV DC supply. It limits peak
>> discharge current from the filter caps - which is the apparent energy
>> source for gold-sputtering from the surface of the grid. In 3-500Z
>> amplifiers, a glitch resistor tends to reduce bending at the unsupported
>> mid-point of the filament helix.
>>
>> >Don't know. Both the Ameritron and the National survived and ran fine
>with
>> >normal meter readings - oops, except I did have to replace a 1N 4001
>diode
>> >on the AL 800H qsk board. It had to do with grid current reading too
>high.
>> >Grid current was showing around 125ma or more until I replaced this
>diode.
>> >
>> Where is the diode in the circuit? Did it short or open?
>>
>> tnx, Steve
>> >
>> >----- Original Message -----
>> >From: "2" <2@vc.net>
>> >To: "Steve M" <wmoorejr@cox.net>; " AMPS" <amps@contesting.com>
>> >Sent: Friday, August 23, 2002 8:50 PM
>> >Subject: Re: [Amps] rocky point effect, barnacle bill
>> >
>> >
>> >>
>> >>
>> >> >For what it is worth dept. A while back I bought a used Ameritron AL
>800H
>> >> >that uses a pair 3cx800. About a minute or so after I first turned it
>on
>> >> >[nothing hooked to it but the power cord] I heard a very loud bang. So
>I
>> >> >shut if off and inspected for damage. Nothing found....
>> >>
>> >> ** does the AL-800 use a glitch resistor?
>> >>
>> >> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
>> >> www.vcnet.com/measures.
>> >> end
>> >>
>> >> _______________________________________________
>> >> Amps mailing list
>> >> Amps@contesting.com
>> >> http://lists.contesting.com/mailman/listinfo/amps
>> >
>> >
>>
>>
>> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
>> www.vcnet.com/measures.
>> end
>>
>
>
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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