Auction ends in less than 20 hours on this 7 1/2 pound chunk of iron. It's a
Dukane
710-4103-04 new old stock power tranny suitable
for powering a 25-30 watt tube amplifier. Here's the link:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=220118254653

[Phil S.]

wrote in message
. net...
Auction ends in less than 20 hours on this 7 1/2 pound chunk of iron. It's
a Dukane
710-4103-04 new old stock power tranny suitable
for powering a 25-30 watt tube amplifier. Here's the link:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=220118254653


One more time: post the schematic where it can be seen with a web link or
just put the spec in the ad copy. Otherwise, this will sell for your
minimum bid. We've already seen this one before. Now stop spamming us with
hard to look up parts of so-so quality. This is meant as cold but friendly
advice.

[maxhifi]

Home constructors of tube equipment should SEVERELY derate power
transformers.


Hi Brett,

I disagree with your comment here, but maybe I'm looking at it from a
different perspective. In my opinion, derating components is good advice to
prevent someone who lacks knowledge from burning their house down, but it
kills the price to performance advantage which home construction can offer.

I wouldn't overload a transformer if it has excessive heating or voltage
drop, but a bit can be tolerated most of the time. My logic is that since
transformers are the most expensive components, it's best to let them be the
limiting factor in an amplifier, rather than tubes, etc which are all
cheaper.

Some old transformers (ex-military for example) can be used in quite a bit
excess of their ratings without a problem.

[Rich Grise]

On Fri, 08 Jun 2007 15:25:12 -0500, tube.guy wrote:

Auction ends in less than 20 hours on this 7 1/2 pound chunk of iron. It's
a Dukane
710-4103-04 new old stock power tranny suitable for powering a 25-30 watt
tube amplifier. Here's the link:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=220118254653

How about a spec? How many windings? How many volts? How many amps?

You might make .45/lb as scrap, but if you want to sell a transformer, you
have to tell your customers what they're about to get.

Good Luck!
Rich

[Phil S.]

"Rich Grise" wrote in message
news
On Fri, 08 Jun 2007 15:25:12 -0500, tube.guy wrote:

Auction ends in less than 20 hours on this 7 1/2 pound chunk of iron.
It's
a Dukane
710-4103-04 new old stock power tranny suitable for powering a 25-30 watt
tube amplifier. Here's the link:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=220118254653

How about a spec? How many windings? How many volts? How many amps?

You might make .45/lb as scrap, but if you want to sell a transformer, you
have to tell your customers what they're about to get.

Good Luck!
Rich


It's all there if you want to load up a binary usenet group on your
newreader and then grope around until you find it. He'll get the $9.99
opening bid for it.