Is your glitch resistor a wire wound resistor? Your glitch resistor needs to
be able to handle the full supply voltage for however long it takes to
discharge the filter caps. Typically this isn't a long time and the wattage
rating of the resistor can probably handle it. The key specification here is
that the resistor needs to be able to handle the full supply voltage for a
few milliseconds. Wire wound resistors don't cut it. They blow when a glitch
occurs.
Metal film or carbon comps are OK.
I haven't started my GS35B amp yet, but I'm planning one for 70cm.
73 es gl,
Jerry, K0TV
----- Original Message -----
From: "Carlo Houben" <carlo.houben1@pandora.be>
To: <Amps@contesting.com>
Sent: Thursday, November 10, 2005 4:43 PM
Subject: [Amps] gs35b on hf problem .
> Hi , i am building a hf amp around a gs35b (new old stock ) in a GG
> configuration
> g3sek triodeboard for control .
> HV 3300V no load .
> The following is my problem :
> 1/ My glitch resistor 33 ohm 17 w passed out by measuring zero signal
> anode current .
> first it was 20Ma and after i put the bias voltage to around 29 V it was
> 100 Ma .
> but after 3 times ptt the glitch resitor past out .
> annyone an idea where i have to look for .
> Thanks in advance .
> 73
> ON4BR
>
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