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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Need\s+help\s+understanding\s+an\s+old\s+Transformer\s*$/: 8 ]

Total 8 documents matching your query.

1. [Amps] Need help understanding an old Transformer (score: 1)
Author: "W5CUL" <w5cul@sbcglobal.net>
Date: Mon, 26 May 2008 11:18:46 -0500
Hi All, I need some help in determining the capability of an old transformer that I ran across. It is an old Thordarson CHT Series built some time in the late 30's early 40's. The model number is T-1
/archives//html/Amps/2008-05/msg00191.html (9,282 bytes)

2. Re: [Amps] Need help understanding an old Transformer (score: 1)
Author: Rick Stealey <rstealey@hotmail.com>
Date: Mon, 26 May 2008 16:34:41 +0000
I THINK you are going to use a full wave rectifier (2 strings of modern diodes), into a choke, and get 3000 volts out, at 500 ma = 1500 watts. Perfect, right at the legal limit. (Ignoring bleeder lo
/archives//html/Amps/2008-05/msg00192.html (8,161 bytes)

3. Re: [Amps] Need help understanding an old Transformer (score: 1)
Author: "W5CUL" <w5cul@sbcglobal.net>
Date: Mon, 26 May 2008 11:47:36 -0500
Rick, You get bonus points for being the first to answer!! Now considering that this is a center tap transformer, 3440-0-3440, and what you indicated seems to be from lets say the 0-3440 secondary le
/archives//html/Amps/2008-05/msg00194.html (9,316 bytes)

4. Re: [Amps] Need help understanding an old Transformer (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Mon, 26 May 2008 09:55:43 -0700
It is what you would get from a choke-input filter and a full-wave rectifier with the ct grounded. No! The spec is saying that you could draw 500 mA from the abovementioned full-wave center-tap circu
/archives//html/Amps/2008-05/msg00195.html (8,693 bytes)

5. Re: [Amps] Need help understanding an old Transformer (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Mon, 26 May 2008 13:47:16 -0400
I THINK you are going to use a full wave rectifier (2 strings of modern diodes), into a choke, and get 3000 volts out, at 500 ma = 1500 watts. Perfect, right at the legal limit. (Ignoring bleeder loa
/archives//html/Amps/2008-05/msg00197.html (9,677 bytes)

6. Re: [Amps] Need help understanding an old Transformer (score: 1)
Author: Rick Stealey <rstealey@hotmail.com>
Date: Mon, 26 May 2008 19:18:05 +0000
Ye Gads, what got into me? In my haste to get an answer out I blew it entirely. Carl, why is that? Rick K2XT _________________________________________________________________ Keep your kids safer on
/archives//html/Amps/2008-05/msg00199.html (8,217 bytes)

7. Re: [Amps] Need help understanding an old Transformer (score: 1)
Author: "Edward Gable" <EGABLE@Rochester.rr.com>
Date: Mon, 26 May 2008 21:26:38 -0400
I concur with interesting comments on this thread. No one has mentioned that a full wave bridge with an ungrounded center tap is not an option using these old transformers. The transformers were desi
/archives//html/Amps/2008-05/msg00202.html (11,974 bytes)

8. Re: [Amps] Need help understanding an old Transformer (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Mon, 26 May 2008 21:40:53 -0400
I didnt mention it since QST and the Handbooks had FW bridge circuits shown for QRO way back into the early 30's. However your point is still valid even more so today as the insulation deteriorates.
/archives//html/Amps/2008-05/msg00203.html (13,312 bytes)


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