How long is your delay? Should be no more than .5 second to 1 second.
73
Jim W7RY
--------------------------------------------------
From: "BEHIELS JEAN-PIERRE" <ON4AEF@base.be>
Sent: Wednesday, January 19, 2011 12:18 AM
To: <amps@contesting.com>
Subject: [Amps] Fireing up a old Tl922 amplifier.
> Hi,
>
> I am busy to fireing up a old Kenwood TL922 amplifier(1985).
> I have already build in a start-up system for both filament and high
> tension power supplys by means of two homebrew timers,and a series small
> resistances in
> de secundairys of both transformers(filament 10 ohm-HV 47 ohm both 50W).
> Both valves are not mounted(running with no charges no consume).
> By power-on the unit I saw that the resistance of 47ohm/50W into the HV
> supply is becoming very hot.
> I have made some measurements during start up around this resistance and
> measure 47 V over this resistance.
> This means that the HV power supply without charge consume 1A idling
> current !!!
> Question is this normal ?
> After the timing sequence the resistance is normally pulling out of the
> system and the supply runs like it must be I suppose,nothing abnormal
> happens further !!
> No overheating behind the amplifier box or whatever,no smoke or burning
> and heating components.
> Just the 10W bleeders over the capacitors warm up a little (can easely
> take my hand on it hi )
> I was wondering while this is so mutch or not ?
> Did I leave the amp a lot many hours under supplying condition to the give
> the HV-capacitors the time to reforme after sutch long time(if this is the
> reason) ???
> Could this last also a reason of the fenomene ?
> Or is 1A just normal standby current value for this amp .....
>
> Regards Jean ON4AEF.
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1191 / Virus Database: 1435/3389 - Release Date: 01/18/11
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|