----- Izvorno sporo?ilo -----
Od: Nermin Bajramovi? <fortra@siol.net>
Za: Osten B Magnusson <sm5dqc@algonet.se>
Poslano: 08. april 2003 22:18
Zadeva: Re: [Amps] FL2100Z showing Ip in standby
> Hi Osten,
>
> the tube which shows resting ip even in standby conditions probably has
> cathode/grid short. eventually try to run amplifier with one tube and
> moderate drive. That might eliminate the "tube cause". Check the
connections
> from drive relay to input tuned circuits and its wiring. Clean the relay
> contacts with plain white paper pressing several times the contacts with
> fingers and rubbing the paper in and out. Of course with the plate and ac
> supply off. When you did check the tubes in other amp, did they also show
> "sign" of ip in standby cndx? Check with the VOM if there are any unusual
> "shorts", with tubes out .
>
> The last advice, do not hurry, cool of, and try another day thoroughly
> checking the walked steps, it might brings the right solution!
>
> Good luck OC,
>
> Nermin S58DX
> ----- Izvorno sporo?ilo -----
> Od: Osten B Magnusson <sm5dqc@algonet.se>
> Za: <amps@contesting.com>
> Poslano: 08. april 2003 20:37
> Zadeva: Re: [Amps] FL2100Z showing Ip in standby
>
>
> >
> >
> > Thanks LA6HV, OZ1PIF, W5LU, KD4LYH and AA6EG for trying to
> > help.
> >
> > I'm now convinced that I have a tube problem, BUT I have never had
> > any Svetlana tubes in the amp...
> >
> > Two things to do: Get some NOS Cetron 572B's or throw the FL2100z
> > away and get an amp with ONE ''real'' tube!
> >
> > Anyway, I still don't understand why I can see Ip in ''stand-by'',
> shouldn't
> > the bias cut off the tubes completely??
> >
> > 73 de Osten SM5DQC sm5dqc@algonet.se
> >
> >
> > _______________________________________________
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> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
>
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