Quite a nice bass amp.
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Alright wiring……I suppose!
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Two chokes in parallel, probably to keep them smaller and able to fit under the chassis.
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The output transformer on these is huge! It is actually larger than the power tranny which.. is usually the other way around. I think it’s a bit of an over-kill really but….as a bass amp.. the larger output tranny will perform better at very low frequencies!
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Yes, I am well-aware that there are two different brands of output tubes here. Two of them were fine and the other original two were completely shot! I replaced the duff two with a slightly used-but-good pair and she set-up really well with these. Another point worth mentioning here: On most amps with multiple push-pull output stages, the tubes, if in a row are normally Left Vs Right (working from the centre outwards….regardless of how many tubes) for the push-pull. However, in these it is actually 1 & 2 in push-pull + 3 & 4 in parallel with 1 & 2 respectively…..an easy one to overlook when replacing tubes and setting up the bias and balance!
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No back panel with this one but not a bad amp. Nevertheless, I wasn’t however too impressed with its final power rating (about 130 watts & she wouldn’t go any more); though it still sounded pretty good!