I traded speakers for a pair of 300 B monoblocks DIY build using 300B, 7119, and 5R4 rectifier
Comparing to my 45, c-500 monos, and several others these amps just don't cut it ---- the 300B's have no id of any kind telling me they are
on the low end of quality the amps have a lot of iron.... OPT's are huge --- looking at how to 1) improve these to amps or 2) build new amps using the OPT's and other parts of quality ?? what other amps might be made using these monster transformers? Or is this a mute question as more detail about the transformers is important to what can be built? As I understand, the transformer dictates the output tube it can run??
Comparing to my 45, c-500 monos, and several others these amps just don't cut it ---- the 300B's have no id of any kind telling me they are
on the low end of quality the amps have a lot of iron.... OPT's are huge --- looking at how to 1) improve these to amps or 2) build new amps using the OPT's and other parts of quality ?? what other amps might be made using these monster transformers? Or is this a mute question as more detail about the transformers is important to what can be built? As I understand, the transformer dictates the output tube it can run??
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Things I would do:
It could be the components are fine but there are problems with tube operating points, or just plain circuit problems. You just don't know without investigating.
- trace the circuit and draw schematic for amp
- measure voltages and determine operating points for the tubes
- measure frequency response
- measure distortion at various output power levels
It could be the components are fine but there are problems with tube operating points, or just plain circuit problems. You just don't know without investigating.
