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Anyone know where i can get a 10v x 10A transformer?

66.91.170.242

DAK

Hi I need a filament transformer and am looking for someone or a business that can provide one for a reasonable price. Used is ok. I know there are some businesses that sell surplus or used trannys and if anyone can provide me a reference would be much appreciated. cheers, Dak

Follow Ups:

RE: Anyone know where i can get a 10v x 10A transformer? - Alex Kitic 07:56:27 07/30/15 (1)
If you're planning to use it for 813 heaters, the best and probably cheapest solution is high frequency AC from a modified electronic transformer for halogen light bulbs, exactly as explained in my RH813 blog article.

It's smaller, cooler running, cheaper, unassuming compared with classic transformer plus rectification etc. - and it's even both better sounding and quieter (hum and noise).

******

http://rh-amps.blogspot.com/
- RE: Anyone know where i can get a 10v x 10A transformer? - DAK 12:10:18 07/30/15 (0)
  Hi Al,, I just got a 11v filament transformer which I can rectify to DC. Thank you for the tip and I hope to try out the transformer you recommend in my next project. take care, Dak
RE: Anyone know where i can get a 10v x 10A transformer? - Eli Duttman 10:21:32 07/26/15 (16)
As power trafos are rated in VA, a 100 VA part is what you want.

If your average AC mains voltage is reasonably high, you might get away with the nominally 9 V. AnTek AS-1209.

Eli D.
- AnTek AS-1209 Toroid (Open in New Window)
- RE: Anyone know where i can get a 10v x 10A transformer? - DAK 11:13:07 07/26/15 (15)
  Thanx Eli, my wall voltage is about 120 volts.
  Actually, my intended use will be to 10vdc for 813 power tube. I will be probably do a Full wave bridge with a choke and cap or something like that. Do, I need to allow for some voltage loss after rectification? regards, Dak
  - RE: Anyone know where i can get a 10v x 10A transformer? - Eli Duttman 12:31:57 07/26/15 (14)
    A critical current choke I/P filter yields approx. 90% of the RMS voltage as DC. A 12 V. transformer and resistive tweaking would seem to be in order.
    
    I dislike using parts at the very limit of their capabilities, as that makes for very poor reliability. With that in mind, a 100 VA trafo is not suitable. The next size up is 200 VA. Way better too much than not enough. AnTek's AS-2212 seems to meet the need.
    
    Eli D.
    - AnTek 200 VA 12 V. Unit (Open in New Window)
    - RE:thanx Eli, what vendor do you recommend for that unit? nt - DAK 13:09:22 07/26/15 (13)
      .
      - Fair Radio sales - unclestu 22:40:00 07/27/15 (3)
        
        In Reply to: RE:thanx Eli, what vendor do you recommend for that unit? nt posted by DAK on July 26, 2015 at 13:09:22
        
        has a 12 Volt 20 amp tranny for $86
        
        RE: Fair Radio sales - Triode_Kingdom 21:52:37 07/28/15 (0)
        
        In Reply to: RE: Fair Radio sales posted by unclestu on July 27, 2015 at 22:40:00
        
        I wouldn't recommend a single transformer for this. The OP isn't planning to regulate the supply. If one tube opens, the other will see a marked increase in filament voltage.
        
        --------------------------
        Buy Chinese. Bury freedom.
        
        RE: Fair Radio sales - Eli Duttman 10:47:59 07/28/15 (0)
        
        In Reply to: RE: Fair Radio sales posted by unclestu on July 27, 2015 at 22:40:00
        
        AnTek wants all of $32 for the 200 VA toroid. :> D Why spend almost 3X more?
        
        Eli D.
        
        RE: Fair Radio sales - DAK 09:31:08 07/28/15 (0)
        
        In Reply to: RE: Fair Radio sales posted by unclestu on July 27, 2015 at 22:40:00
        
        thanx Stuie, I will check it out. regards, DAk
      - Alternatives... - Triode_Kingdom 22:50:09 07/26/15 (6)
        
        In Reply to: RE:thanx Eli, what vendor do you recommend for that unit? nt posted by DAK on July 26, 2015 at 13:09:22
        
        If you want a transformer that isn't made in China, I've pretty sure Hammond (and maybe Edcor) can provide what you need for this. There are also vintage NOS transformers on eBay from well-known companies like Stancor, Triad, etc.
        
        --------------------------
        Buy Chinese. Bury freedom.
        
        RE: Alternatives... - amnesiac 08:38:12 07/28/15 (1)
        
        In Reply to: RE: Alternatives... posted by Triode_Kingdom on July 26, 2015 at 22:50:09
        
        toroid is not ideal because of the noise it passed according to Rod Colemans fillimant instructions. Split bobon?
        
        RE: Alternatives... - Eli Duttman 10:44:35 07/28/15 (0)
        
        In Reply to: RE: Alternatives... posted by amnesiac on July 28, 2015 at 08:38:12
        
        Yes, toroids are wide bandwidth. You deal with the garbage riding on the AC mains by putting ferrite beads on primary side leads.
        
        Eli D.
        
        RE: Alternatives... - DAK 23:51:08 07/26/15 (3)
        
        In Reply to: RE: Alternatives... posted by Triode_Kingdom on July 26, 2015 at 22:50:09
        
        Hey, TK, I checked Hammond and they do have 10v transformers but I think I have to order it from the factory. I know Antique Electronics does not carry but maybe I can order thru Angela. I have been searching epay diligently and currently none are available. I was outbid recently on a pair as I did not realize that they are somewhat rare. I am in no rush so I will just bide my time. regards, Dak
        
        RE: Alternatives... - Eli Duttman 09:29:01 07/27/15 (0)
        
        In Reply to: RE: Alternatives... posted by DAK on July 26, 2015 at 23:51:08
        
        You can't use a 10 VRMS trafo to get 10 VDC, when critical current choke I/P filtration is employed.
        
        AFAIK, 11 VRMS secondary "iron" is not a stock item.
        
        BTW, some "Hammond" items are now manufactured in China. It gets tougher and tougher to exorcise the Chinese "Boogeyman".
        
        The current Chinese regime will not endure. Whether any of us will see it fall is another matter.
        
        Eli D.
        
        What's the problem with ordering from Hammond? - Lew 07:27:38 07/27/15 (1)
        
        In Reply to: RE: Alternatives... posted by DAK on July 26, 2015 at 23:51:08
        
        I do it routinely if the part is not for sale by one of their vendors. There is no cost penalty.
        
        Mouser, Digikey, Allied and Newark also sell Hammond (nt) - Triode_Kingdom 08:04:56 07/27/15 (0)
        
        In Reply to: RE: What's the problem with ordering from Hammond? posted by Lew on July 27, 2015 at 07:27:38
        
        nada aqui
        --------------------------
        Buy Chinese. Bury freedom.
      - RE:thanx Eli, what vendor do you recommend for that unit? nt - thermionic addictions 14:02:12 07/26/15 (0)
        
        In Reply to: RE:thanx Eli, what vendor do you recommend for that unit? nt posted by DAK on July 26, 2015 at 13:09:22
        
        try here
        http://www.antekinc.com/200va/ (Open in New Window)
      - AnTek sells direct. (nt) - Eli Duttman 13:27:35 07/26/15 (0)
        
        In Reply to: RE:thanx Eli, what vendor do you recommend for that unit? nt posted by DAK on July 26, 2015 at 13:09:22
        
        Eli D.

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