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Dedicated 6.3v filament transformer 240v primary
Dedicated 6.3v filament transformer 240v primary
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Old 22nd June 2009, 11:25 PM   #1
DrewP is offline DrewP
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Default Dedicated 6.3v filament transformer 240v primary

Folks, I have a project up where my B+ is all sorted but I'm chasing a dedicated 6.3v supply for a quartet of 6cg7's (9 pin equiv of 6sn7) and a quartet of el84's.

At around 800mA a piece I make that all up that's about 6 and a half amps of 6.3v.

I'm in Australia where supply is 240v

Anyone know of a dedicated filament tranny?
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Old 22nd June 2009, 11:39 PM   #2
leadbelly is offline leadbelly  Canada
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6.3VAC is a pretty common transformer rating, probably only 2nd to 12.6VAC, at least for chassis mount type. Are there any local retail electronics shops where you live? Is Jaycar the big chain over there? I guess you could always mail order a Hammond if not.
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Old 23rd June 2009, 01:14 AM   #3
Eli Duttman is offline Eli Duttman  United States
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Quote:
Anyone know of a dedicated filament tranny?
Can you locate a Triad dealer in "Oz"? Triad's model VPL12-4000 seems to be an excellent fit. You even get separate 6.3 VAC windings for each channel.
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Old 23rd June 2009, 03:25 AM   #4
Rob11966 is offline Rob11966  Australia
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Hi Drew,

I would have a look at Edcor. If they don't have one already designed (check their database) they will make to your specs with a USD20 design fee. Even with the exchange rate, their transformers are very wel priced. Factoring in postage, a custom Edcor will cost around the same as a Hammond purchased locally - probably a bit cheaper. The product is good and they are easy to deal with but a bit slow answering emails.

Cheers,

Rob
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Old 23rd June 2009, 03:34 AM   #5
DrewP is offline DrewP
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Yes, looks like a 50 watt filament tranny from Hammond supplied by the aust distributors will be in the ballpark of $220 ($170 US).
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Old 23rd June 2009, 03:37 AM   #6
Rob11966 is offline Rob11966  Australia
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Hi again Drew,

Just had a look at the Edcor site. No filament tranformer that I could see, so if you were going to use them you would have to go with the custom design. The one off design fee is listed as $40, not $20 as I indicated in my post above.

Cheers,

Rob
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Old 23rd June 2009, 03:42 AM   #7
Rob11966 is offline Rob11966  Australia
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Quote:
Originally posted by DrewP
Yes, looks like a 50 watt filament tranny from Hammond supplied by the aust distributors will be in the ballpark of $220 ($170 US).
Looking at Edcors current price list, I would imagine that the transformer would be around USD 70, add the design fee and you are looking at $110. Can't remember exactly how much it costs to post one transformer but I am thinking about $40. All up maybe $150. Still cheaper than the Hammond but not by a lot.

Rob
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Old 23rd June 2009, 03:44 AM   #8
DrewP is offline DrewP
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Default Series connection of similar heaters?

Just a thought...

If I was running 4 x el84 then could I hook them up in series to a 25 volt supply capable of delivering 1Amp?
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Old 23rd June 2009, 03:46 AM   #9
Eli Duttman is offline Eli Duttman  United States
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Allied Electronics shows 14.30 USD as the price for a Triad VPL12-4000. Even with the overhead of exchange rate, shipping, and duties, you will come out WAY ahead. If a "local" distributor can be found, so much the better.

Check this page out. A list of Aussie Triad distributors is shown.
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Old 23rd June 2009, 03:47 AM   #10
leadbelly is offline leadbelly  Canada
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If you're willing to wire them in series just use this one:

http://www.jaycar.com.au/productView...T&SUBCATID=411
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