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Old 13th April 2012, 12:10 AM   #1
cm7 is offline cm7  United States
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Default FS: Magnequest Custom Line Out Transformers

Magnequest Custom Line Out Transformers

Another pair of these were used with a 12B4A as a fantastic line. I don't know exactly what they are gapped for. I think around 20ma.

600 ohm, 150 ohm, 32 ohm taps.

Look great except for .25" sq nick in the paint on top of one transformer.

Teflon wire lead outs.

$275 pair (add 3% for Paypal)

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Old 13th April 2012, 01:33 AM   #2
Zen Mod is offline Zen Mod  Serbia
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what's primary impedance ?

I presume 600 is primary winding , and 150 is secondary winding, with 32 tap ?
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Last edited by Zen Mod; 13th April 2012 at 01:45 AM.
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Old 13th April 2012, 01:58 AM   #3
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I bet 5k primary with 600 secondary with 150 and 32 tap.
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Old 13th April 2012, 02:29 AM   #4
cm7 is offline cm7  United States
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Thanks for your interest.

The secondaries are 600 ohm, 150 ohm, and 32 ohm. I think the primary is around 5K. I don't know the primary inductance but these are large line out transformers at 5lbs each.
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Old 13th April 2012, 10:20 AM   #5
Zen Mod is offline Zen Mod  Serbia
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tnx for reply

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Old 13th April 2012, 11:06 AM   #6
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Quote:
Originally Posted by cm7 View Post
Thanks for your interest.

The secondaries are 600 ohm, 150 ohm, and 32 ohm. I think the primary is around 5K. I don't know the primary inductance but these are large line out transformers at 5lbs each.
You can't think the primary is "around 5k".
It must be known, otherwise the secondaries cannot be called 600, 150 and 32 ohm.
When you're not sure, just measure the winding ratio (simple to do, but do it unloaded).
For example, when it is 3:1 from the primary winding to the secondary "600 ohm" tap, you deal with a 5k4 primary impedance (600 x 3), which is quite likely for a line output transformer.
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Old 13th April 2012, 11:14 AM   #7
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They look very much like some custom 12B4 transformers Electraprint made for me.
Are you sure the transformers are Magnequest? My reason for asking is the similarity with my Electraprints, and that Mike usually make parafeed transformers with a completely different formfactor.
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Old 13th April 2012, 12:26 PM   #8
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Originally Posted by bequerel View Post
They look very much like some custom 12B4 transformers Electraprint made for me.
Are you sure the transformers are Magnequest? My reason for asking is the similarity with my Electraprints, and that Mike usually make parafeed transformers with a completely different formfactor.
Mike makes some like this, and Electraprint doesn't use Brass screws, but Mike always does.
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Old 13th April 2012, 01:50 PM   #9
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yes, these look like the MQ irons i have. they are rated 5k primary, gapped at 30mA. Electraprint does not use brass screws for the bell covers, and the finishing surface is different from MQ too.
Click the image to open in full size.
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Old 13th April 2012, 04:21 PM   #10
cm7 is offline cm7  United States
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Yes. They look just like those except they do not have the "MQ" silkscreen.

I apologize for not testing. I am very busy at the moment. I normally would not post something without more information.

I also have some Magnequest FS-100 that I may part with but they will be very expensive compared to these

Great feedback from everyone, thanks.
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