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looking for 50+50VCT preamp transformer
looking for 50+50VCT preamp transformer
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Old 21st January 2020, 12:05 AM   #1
keilau is offline keilau  United States
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Location: Windy City, US
Default looking for 50+50VCT preamp transformer

I am looking for a 100VCT or 50V+50V dual core small power transformer for a preamp circuit. 15 to 30VA size will work.
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Old 21st January 2020, 04:02 AM   #2
savvas is offline savvas  Greece
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Brand, eshop or type of transformer suggestion ?
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Old 21st January 2020, 04:29 AM   #3
rayma is offline rayma  United States
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May have to go to 50VA for a dual 55VAC toroid.
Transformers and Power Converters From Avel Lindberg, Inc.
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Old 21st January 2020, 05:27 AM   #4
keilau is offline keilau  United States
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Quote:
Originally Posted by rayma View Post
May have to go to 50VA for a dual 55VAC toroid.
Transformers and Power Converters From Avel Lindberg, Inc.
Yes, this is the ideal transformer for my use. The problem is finding a retail seller offering single unit at an affordable price.

Google "Avel Lindberg" and model Y236208 did not turn up any retail source. Suggestion?

Last edited by keilau; 21st January 2020 at 05:36 AM.
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Old 21st January 2020, 02:43 PM   #5
savvas is offline savvas  Greece
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For a 50VA there is always Hammond for people in the other side of the Atlantic.
It's hard to find ready made 100VACT in a smallish 15-30VA rating.
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Old 21st January 2020, 03:17 PM   #6
keilau is offline keilau  United States
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Quote:
Originally Posted by savvas View Post
For a 50VA there is always Hammond for people in the other side of the Atlantic.
It's hard to find ready made 100VACT in a smallish 15-30VA rating.
Thank you for the tip. Mouser at US carries the model you suggested.
166G100 Hammond Manufacturing | Mouser

Actually, Digi-Key in US also stock Harmond Transformers. The closest is a 36VA, 60V+60V. This one may work too. It is smaller, thus cheaper at Digi-Key.
164J120 Hammond Manufacturing | Transformers | DigiKey

Last edited by keilau; 21st January 2020 at 03:25 PM.
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Old 21st January 2020, 03:50 PM   #7
Mark Tillotson is online now Mark Tillotson
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Voltage multiplier circuit perhaps? Low power high voltage secondaries are less common.
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Old 21st January 2020, 04:31 PM   #8
Lingwendil is online now Lingwendil  United States
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if 40+40 will work Antek has one for ~11$USD plus very reasonable ~7$USD shipping cost-

AN-0240 - 25VA 40V Transformer - AnTek Products Corp
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Old 22nd January 2020, 02:47 AM   #9
keilau is offline keilau  United States
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Quote:
Originally Posted by Mark Tillotson View Post
Voltage multiplier circuit perhaps? Low power high voltage secondaries are less common.
This is actually the same question that I asked 2 years ago.
3 outputs PSU for power amplifier

I have a 640VA toroidal (Avel Lindberg from Parts Express) for the power amplifier output stage. It is 40V+40VAC and results in 56V+56VDC. The smaller 50V+50VAC will drive a PSU board to create a 60V+60VDC supply for the input and voltage amp stage.

The idea of using a voltage doubler comes across my mind. I understand the basic doubler circuit, but I lack the experience to select the proper components for good results.
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Old 22nd January 2020, 02:59 AM   #10
rayma is offline rayma  United States
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Quote:
Originally Posted by keilau View Post
The idea of using a voltage doubler comes across my mind. I understand the basic
doubler circuit, but I lack the experience to select the proper components for good results.
It's easy, post your circuit here.

Last edited by rayma; 22nd January 2020 at 03:01 AM.
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