Hello people,
As the title states I’m looking for a 300B power transformer. Hopefully one of you has a dusty one laying around.
Cheers,
James.
As the title states I’m looking for a 300B power transformer. Hopefully one of you has a dusty one laying around.
Cheers,
James.
Buy an Antek. It's easier. Get the metal bell cover EM shield.
I've got options, depending on what B+ you are shooting for and how. And assuming 120V line.
Hammond 290CX. This is a horizontal mount/guitar amp style transformer. With a 5AR4 CLC, depending a bit on bias, you can get around 370-380V on my line. That's with a choke at like 75 or 80 ohms, so quite a bit of room to get lower or higher with different PS configurations. Near new. Only run for testing. Stayed cool and quiet. Maybe $80 shipped (US)?
I've got an VERY ugly horizontal mount guitar amp transformer. Banged up; ugly bolts; no moisture/lams not rusty. Similar to the Hammond, but higher voltage secondaries. Single primaries. More like 390V run similarly. It runs warm but quiet. I'm running it right now in the test version of the amp. Maybe $40 shipped (US)?
I've also got an Edcor 179. Also like new. It makes a little noise. Like an Edcor. I'm probably going to use this one in the final build with some damping in the bells. It is giving me like 385V and I was thinking 400V, so at the right price, it might be available for rehoming. ($150 shipped?)
Paul
Hammond 290CX. This is a horizontal mount/guitar amp style transformer. With a 5AR4 CLC, depending a bit on bias, you can get around 370-380V on my line. That's with a choke at like 75 or 80 ohms, so quite a bit of room to get lower or higher with different PS configurations. Near new. Only run for testing. Stayed cool and quiet. Maybe $80 shipped (US)?
I've got an VERY ugly horizontal mount guitar amp transformer. Banged up; ugly bolts; no moisture/lams not rusty. Similar to the Hammond, but higher voltage secondaries. Single primaries. More like 390V run similarly. It runs warm but quiet. I'm running it right now in the test version of the amp. Maybe $40 shipped (US)?
I've also got an Edcor 179. Also like new. It makes a little noise. Like an Edcor. I'm probably going to use this one in the final build with some damping in the bells. It is giving me like 385V and I was thinking 400V, so at the right price, it might be available for rehoming. ($150 shipped?)
Paul
I have a couple of Audio Note 300B PT's. These are the original AN power trannies. If you are interested. I wll pull out of storage and provide photo;s and specs.
Cheers,
Geary
Cheers,
Geary
https://www.audioasylumtrader.com/c.../Power-Transformer-for-300B-Stereo-Amp/229813
PS.
Geary , you have PM
PS.
Geary , you have PM
I have used Antek at least 12 times but they don't think they have enough windings for all the heaters?
I always use a separate heater trafo with the Rod Coleman 300b heaters. I use the 6.3 only for the driver heater, also regulated with a low drop reg. I find the HV doesn't sag as much as with a regular EI core trafo.
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I've used Antek trafos in several of my amps (300b included). I think I currently used this in my TSE-II build AS-3T325. I think plenty windings for heater options. Two 6.3VAC@4A each: one for 300B heaters (2.4A total), one for input tubes. Send each through DC converter + regulator (nothing fancy, just based on LM317 or something similar). The only negative thing on Antek is no center-tap secondary, but a rectifier bridge can solve that
Can't beat on Antek price and availability (immediate shipping)
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It would appear that Geary has exactly what I'm looking for.
Thanks you all for the suggestions!
Thanks you all for the suggestions!