?I have cut C18 positive leg in Q01 collector. Leaving some mm of it to be able to solder new capacitor. Negative is surface soldered, large area.
Removed capacitor show 14.5 Ohm in both senses. No capacitance. BAD.
Before I measured 19 Ohm both senses between collector and emisor. Emisor goes to ground with a 4.7 Ohm resistor consistent with above. Now Q01 shows OK.
Now I have two option, replace C18, close and try, or keep checking capacitors.
In the only detaliled video in youtube the spanish OM changed this capacitor (obviously BLASTED) and another in the 13.5V constant voltage to drivers collectors.
To note that all others 10uF capacitor are identical in aspect and 16V, and might be more or less OK. This is differente color, 25V, and much larger.
It was easily accesible removing the side plate to wich nothing is attached, even if it has a hole to screw Q01 and use plate as radiator. I will do it. For what I need a mica, now there is only some paper in the aluminium "radiator" never has been a screw there, the paper does not have hole.
Now total power intensity in TX13.5V is less than 300mA. 50mA for Q01 collector. 250mA for bias of finals ( I hope in these 250mA there are not included some mA for a bad capacitor), there are 4 of them in this line. And another 4 capacitors in 13.5V constant voltage for drivers collector.
All above could have been better documented with photos, but it seem it is not possible to add them.
73 EA1FC
