Replacement Power Transformer for 1959 HW

[johnnyg]

Hey guys!

The power transformer in my 1959HW head fried. Will the Metro Laydown 100W PT work in this amp? Is that the right one to get?

If not, which do you guys recommend?

Thanks!

jg

[johnnyg]

It's not under warranty anymore, unfortunately, as I have owned this amp for quite a few years now and it isn't completely stock anymore (snipped bright cap and Metro OT since the original fried a few years ago).

Thanks for the info!

Before I order, my tech was wondering if the PT has wires or solder terminals? Perhaps I'm unclear with the question but that is what he asked. Any ideas?

Thanks again

jg

PS My tech also found it very odd that the PT fried but after diagnosing it and finding that there was a short, that's what he concluded. It just started blowing fuses out of nowhere.

[OnTheFritz]

The PT fried? Is it still under warranty?
The Metro/Heyboer would be a fine replacement.

[neikeel]

These are pretty good. You even have choice of secondary taps and option of dual B+ switching.

http://forum.metroamp.com/viewtopic.php?f=42&t=41208

[johnnyg]

I finally got a hold of Heyboer to order the Metro clone, but apparently the stack isn't as tall as the stock power transformer. My tech is concerned about this. Does that mean that the transformer isn't compatible?

thanks!

jg

[neikeel]

I finally got a hold of Heyboer to order the Metro clone, but apparently the stack isn't as tall as the stock power transformer. My tech is concerned about this. Does that mean that the transformer isn't compatible?

thanks!

jg

I have used several of these, they are exactly the same size as my original T2562s from the 60s and 79s, it seems that it is the HW PT that is out of step and more importantly fried! I think your tech ought to carry on with Plan A, assuming Heyboer are going to send you a correct T2562 Metro spec clone?

[johnnyg]

I was just going to have him order this one:
http://metroamp.com/store/index.php?mai ... cts_id=549" onclick="window.open(this.href);return false;

But apparently it is only a 2" stack (according to Phil at Heyboer) and the stock 1959HW power transformer is about 3 1/4". Also, the voltages don't exactly match up. It sounds like he wants to get the closest thing possible in order to assure reliability.

I already have the Metro Dagnall 1998C Output Transformer clone so I was hoping to stick with Metro for the PT. The Mercury PT that my tech is suggesting is supposed to be a direct drop in replacement. As you may know, however, it is pretty expensive!

jg

[OnTheFritz]

Go with the Heyboer and don't even blink. It will be totally fine.
If the Metro 12 series amps that kick ass with this rock, yours will be brilliant. Plate voltage options, can't go wrong.

[neikeel]

I was just going to have him order this one:
http://metroamp.com/store/index.php?mai ... cts_id=549" onclick="window.open(this.href);return false;

But apparently it is only a 2" stack (according to Phil at Heyboer) and the stock 1959HW power transformer is about 3 1/4". Also, the voltages don't exactly match up. It sounds like he wants to get the closest thing possible in order to assure reliability.

I already have the Metro Dagnall 1998C Output Transformer clone so I was hoping to stick with Metro for the PT. The Mercury PT that my tech is suggesting is supposed to be a direct drop in replacement. As you may know, however, it is pretty expensive!

jg

A few techs get cut a deal with MM I am lead to believe. If the HW PT is a 3 1/4" stack then it is more like a copy of the earlier Drake 1203-80 PT from the 67 era amps. The voltages are no different if my 67 and 68 are representative of them all.

[born_hard]

My power Transformer fried also in my 1959HW. Which Heyboer PT is a appropriate replacement? Did somebody put a Heyboer PT in a 1959HW already? A switchable B+ would be cool on this amp, i think. I appreciate any help.

[Roe]

The classictone PTs are a great value but they do not have dual secondaries like the Metro and Marstran 1230-80s

[Littlewyan]

The OT fried at some point as well?! God dam thats bad luck. Not very reassuring either that someone else has also had a blown PT in their 1959HW. Those transformers should be rock solid, what on earth is causing them to short?

[Carbia]

unfortunately, I've seen many modern marshall transformers fried... I don't know why... but sucks.

[neikeel]

The OT fried at some point as well?! God dam thats bad luck. Not very reassuring either that someone else has also had a blown PT in their 1959HW. Those transformers should be rock solid, what on earth is causing them to short?

I dont think the OT was fried, I believe it was replaced during a blueprinting exercise chasing the tone in Georges HW modding thread.

[VelvetGeorge]

The early HW OT's had a critical flaw. An error from the original Dagnall spec sheet that was not caught. This is confirmed by someone who was at Marshall during that time.

I'm not sure when the error was corrected.

george