Introduction + Liverpool PT question(s).

[dartanion]

The 300mA PT is what Ken used. I can see backing off of that as it's overkill, but it will change how the amp performs. I have built dozens of Liverpool type amps using both the 5199 and the Pacific PT. They both work out well within spec for a Liverpool or Express with the filament voltage being nuts on 6.3V with only 1 or 2 that were around 6.6V. Is having all the other taps a detriment to the PT? I think not. Do some searches Mark, and I am sure you'll find lots of info when it comes to TW transformers. However, nothing is stopping you from doing a Liverpool with a 200mA PT.

[Structo]

If I were to make a replica of an amp, or clone, I would try to follow the design parameters that the original designer set forth.
So if he used a transformer that had a larger than necessary capacity, I would use it because it may be key to the sound of the amp.

So power and filtering should be key ingredients or foundation of the amp.

[M Fowler]

https://tubeamparchive.com/viewtopic.php?t=9866

[RJ Guitars]

https://tubeamparchive.com/viewtopic.php?t=9866

Thank You Mark for putting this together... it's a great resource.

When you read these voltage ratings you want to be aware that Heyboer uses an unloaded specification and Pacific (and Edcor) use a loaded rating... ultimately this has been measured out to show that the actual voltages attained with the Heyboers and Pacifics are the same.

rj