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Bottlehead Forum Welcome! Need support, you got it. Or share you ideas and experiences. |
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Bottlehead Forum Welcome! Need support, you got it. Or share you ideas and experiences. |
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In Reply to: Great posts and now to save my TFA2004s... posted by Garland on March 1, 2005 at 06:07:02:
If you do decide to use a Hammond power transformer I would suggest getting one that is of a higher current rating than you actually need as a hedge against noise and high voltage secondary failure. My experiences have been such that I do not use them in our products any more. My hunch is that the primary turns count tends to be so low that the transformers end up vibrating themselves into a failure mode as the HV secondary turns at the end of the winding slip and touch other layers. We have seen high voltage secondary failures of as many as 12 units in a batch of 50 in the past, and this week I am assisting someone who has experienced a high voltage secondary failure of a 300 series trans after it has been running (noisily) for a year or two, at a current below it's maximum current rating.FWIW an MQ PGP 8.1 is more spendy, but they are extremely reliable. You might also want to look around for surplus iron like Thordarson, Stancor, or UTC.
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Follow Ups
- Re: Great posts and now to save my TFA2004s... - Doc B. 08:47:31 03/01/05 (2)
- Were they used FW center tap or FW bridge? - VoltSecond 20:35:34 03/02/05 (0)
- Power Iron - Sector-7G 05:29:43 03/02/05 (0)
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