UTC HA-133 Needs rewound... any value as is?
- Thread starter jwhmca
- Start date
Help Support GroupDIY Audio Forum:
good for a door stop or as a sinker for lake trout in August,
on a serious note, those have inexpensive steel lams, the cans are nice if you want to stuff a DIY transformer in there, sometimes they go for 20 bucks on evilbay, sometimes 300,
a newer version will be more reliable, rewinding will make it hard to sell,
they are fun to take apart,
on a serious note, those have inexpensive steel lams, the cans are nice if you want to stuff a DIY transformer in there, sometimes they go for 20 bucks on evilbay, sometimes 300,
a newer version will be more reliable, rewinding will make it hard to sell,
they are fun to take apart,
just some Ampex trivia from Doc Hoyer>
"WHEN AMPEX came out with the 351, they really got CHEAP and used a smaller PUSH-PULL OPT with a tertiary FB winding,
I never did find out who made that PUSH-PULL OUTPUT coil for AMPEX, but I did later LEARN that AMPEX went to the CHEAPEST SUPPLIER that they could find.They were still HIGH-PRICED DAMNED GOOD MACHINES, and I own three 351's, and one 601-2P
I forgot to tell you I have the Central Transformer Company and TRIAD SE-OPT'S units that AMPEX also used. PEERLESS ALSO MADE ONE FOR AMPEX "
"WHEN AMPEX came out with the 351, they really got CHEAP and used a smaller PUSH-PULL OPT with a tertiary FB winding,
I never did find out who made that PUSH-PULL OUTPUT coil for AMPEX, but I did later LEARN that AMPEX went to the CHEAPEST SUPPLIER that they could find.They were still HIGH-PRICED DAMNED GOOD MACHINES, and I own three 351's, and one 601-2P
I forgot to tell you I have the Central Transformer Company and TRIAD SE-OPT'S units that AMPEX also used. PEERLESS ALSO MADE ONE FOR AMPEX "
Ampex 400A used an HA-133 output transformer, with a 6C5 triode output stage.
Did they use the same output transformer on the 350 which has a 6F6 pentode stage ? Isn't the plate current of the 6F6 stage exceeding the 8mA rating of the HA-133 ?
Did they use the same output transformer on the 350 which has a 6F6 pentode stage ? Isn't the plate current of the 6F6 stage exceeding the 8mA rating of the HA-133 ?
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