Transfos Anyone?

philipbarrett · 22nd November 2005, 03:32 AM

I finished a little 50EH5 amp for my computer system (thanks Dad's projects for the design idea) but really need a pair of OTs to replace the temporary "ripped from an Akai" pair I have in for testing.

Anyone got a pair of about 7K prim. to 8 or 4 ohm with a very small footprint (we're talking less than a watt here) in the junkbox they'd be interested in selling me?

Thanks.

PB

Sherman · 22nd November 2005, 01:49 PM

Well, they are 5K, not 7K but Uncle Ned at Triode Electronics has a really nice little SE OPT for five watts, 40mA. It is a 'guitar' OPT with limited bass (50Hz) but at 1 watt you won't have much bass anyway.

They are very small and very inexpensive at $15 each. Response it 50-20K Hz within 3dB. Pick up a 325-0-325 5V, 6.3V PTX for $39 and a 4H 90mA choke for $10 and you have the iron for a nice little spud amp! I doubt the difference between 5K and 7K would matter much.

philipbarrett · 22nd November 2005, 02:52 PM

Thanks - I went to Triode, which one were you referring too? 5K is fine.

PB

dstockwell · 22nd November 2005, 03:01 PM

Transformer is rated 100 Hz to 20 KHz -2 dB at 5 watts with 40 ma (maximum recommended) primary current.

http://www.triodeelectronics.com/tfchxfwi48oh.html

philipbarrett · 22nd November 2005, 03:06 PM

Thanks - sent 'em my $28!

Same mounting holes as the Akai's - woo hoo!

PB

22nd November 2005, 03:32 AM	#1
philipbarrett diyAudio Member Join Date: Feb 2005 Location: Dallas, Texas	Transfos Anyone? I finished a little 50EH5 amp for my computer system (thanks Dad's projects for the design idea) but really need a pair of OTs to replace the temporary "ripped from an Akai" pair I have in for testing. Anyone got a pair of about 7K prim. to 8 or 4 ohm with a very small footprint (we're talking less than a watt here) in the junkbox they'd be interested in selling me? Thanks. PB

22nd November 2005, 01:49 PM	#2
Sherman diyAudio Member Join Date: Feb 2004 Location: Chicago area	Well, they are 5K, not 7K but Uncle Ned at Triode Electronics has a really nice little SE OPT for five watts, 40mA. It is a 'guitar' OPT with limited bass (50Hz) but at 1 watt you won't have much bass anyway. They are very small and very inexpensive at $15 each. Response it 50-20K Hz within 3dB. Pick up a 325-0-325 5V, 6.3V PTX for $39 and a 4H 90mA choke for $10 and you have the iron for a nice little spud amp! I doubt the difference between 5K and 7K would matter much. __________________ --Sherman

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22nd November 2005, 02:52 PM	#3
philipbarrett diyAudio Member Join Date: Feb 2005 Location: Dallas, Texas	Thanks - I went to Triode, which one were you referring too? 5K is fine. PB

22nd November 2005, 03:01 PM	#4
dstockwell diyAudio Member Join Date: Jul 2005 Location: Georgia	Transformer is rated 100 Hz to 20 KHz -2 dB at 5 watts with 40 ma (maximum recommended) primary current. http://www.triodeelectronics.com/tfchxfwi48oh.html

22nd November 2005, 03:06 PM	#5
philipbarrett diyAudio Member Join Date: Feb 2005 Location: Dallas, Texas	Thanks - sent 'em my $28! Same mounting holes as the Akai's - woo hoo! PB

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