| Author | Message | ||
| Alan Foster (workhouse) Username: workhouse Registered: 05-2013 |
I have acquired a 212- 65 and discovered the power requirement is 120 volt mains as detailed on the back panel plate. I live in the UK so I wish to know if there is a 250v tap on the primary winding on the existing transformer, or do I have to source a replacement (Euro)transformer ? Please advise. | ||
| Lars Verholt (lmv) Username: lmv Registered: 11-2009 |
Hi Alan, if this amp was originally sold in North America, the mains transformer does not have a tap for 220/250V. You can get a replacement transformer from www.tubeampdoctor.com . Please note, if your amp is the old type with the 12AX7/ECC83 phase splitter tube (valve), a slight modification is required. The modification is documented in a Music Man service bulletin that you can download from this forum's website. Cheers, Lars Verholt | ||
| Alan Foster (workhouse) Username: workhouse Registered: 05-2013 |
Hi Lars, Thank you for you help with my query. Yes it does have a 12AX7/ECC83 phase splitter so I'll check out the service bulletin. I'll power it up with a variac before I go any further just to make sure the amp is in a reasonable condition and the output transformer is OK. I aim to fit EL34's as I understand this is a straight swop out without modification. regards Alan | ||
| Mike Kaus (mm210) Username: mm210 Registered: 05-2006 |
Straight swap yes but I DO suggest tightening and cleaning the sockets when you replace them. That amp is 1974-77 or so and it may have loosened up a little. Just my 2c's worth. It could use a cap job too. They're 30+ years old. Mike. | ||
| Alan Foster (workhouse) Username: workhouse Registered: 05-2013 |
Hi Mike, Thanks for the tip, like me I must be due a cap job as well then I was in my mid 20's .... seemed like yesterday  Alan. |
Tue, 03/25/2014 - 09:48
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