Bronco amp - first glimpse

[Yorkie]

The resistor doesn't 'feed' the smoothing cap - it's between the smoothing cap and reservoir cap and on the circuit is shown as 1 Watt 1K. It's obviously struggled to cope, and I'd be inclined to replace it with a modern wirewound resistor. A 2 or 3 Watt one would do, but personally, I'd be inclined to use a 7 Watt one which would run much cooler and is small enough physically, at just 35mm (1.5") long and 10mm square. Alternatively, if you preferred to use a tubular one closer to the appearance of the existing carbon composition one you could use a metal film 2 Watt one (eg, Maplin Code 'D1K'). The 7 Watt wire-wound one is code L1K:

http://www.maplin.co.uk/7-watt-wirewound-resistor-2179

As I said earlier, given the age of the amp, personally - though they look physically OK - I'd be inclined to change the tubular caps - especially the one between the Anode of the 1/2 12AX7 and the Grid of the 6V6GT, but if you prefer to leave them in place, I'd at least check their leakage - I think you have at least one cap tester that can test them at their rated voltage. I'd also replace the 25uF 25V electrolytic cathode bypass caps in the 6V6,and the 12AX7s, (four in total I think), but the disc ceramic caps should be fine.

That would be my thoughts.

Overall it looks in nice condition, well constructed and easy to work on.

Hope that helps Rob.