r. Unfortunately Q203 is one of the more tedious-to-replace transistors in the HP130C, so at present it's put-off-today-what-you-can-do-later :), with the added excuse: experimentally lets see how long such a simple emergency fix is good for.
Berj / KI3U
To: TekScopes@... From: gumbear@... Date: Fri, 20 Jan 2012 18:29:40 +0000 Subject: [TekScopes] Re: Nuvistors.
?
Q203 may have developed more leakage over the years and will eventually have to be replaced. I'd look for a replacment just to be ready for when it does.
Arden
> By way of a little OT, mine after decades of routine use last year developed, upon warm-up, folding and contracting of the trace. The problem turned out to be transistor Q203 in the horizontal amplifier. The extend-its-life-fix was to put a 10-fins light sheet aluminum heatsink on Q203.
