Help! LL1676 - what did I do wrong??? - Joelt - K&K Audio / Lundahl Transformers

K&K Audio / Lundahl Transformers

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Help! LL1676 - what did I do wrong???

Hi Guys,
I wired up my LL1676 input transformer for application in a new amp, and the initial tests on it came out horrible. It rang like crazy on a 1kHz square wave, and only cleaned up when I lowered the load across each seconday to a measley 1k ohms.
I have it wired in the "1:1" setup that's been discussed here before.
INPUT POS: pin #9 + #7
INPUT NEG: pin #10 + #8 + #6
OUTPUT POS: pin #2
OUTPUT NEG: pin #5
OUTPUT GND: pin #4 + #1
I also tried seperating Pin #8 and grounding that, which didn't help. The input negative side has to be grounded also, otherwise I get what looks like oscillation. I thought that was optional?
The source I'm using is a Protek signal generator with a 600 ohm output impedance (measured at 580 ohms), and output is measured with my Philips scope, 1M/20pF input.
Did I wire it wrong, measure it wrong, or is this the type of performance to expect?
Joel

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Topic - Help! LL1676 - what did I do wrong??? - Joelt 10:11:27 04/25/04 (7)

Re: Help! LL1676 - what did I do wrong??? - Gary P 06:43:05 04/26/04 (0)

thanks guys. It wasn't me... - Joelt 06:36:40 04/26/04 (2)

I hear with my ears, not with my oscilloscope - KevinC 08:03:12 04/26/04 (1)

Amen! (nt) - AnandR 19:49:50 04/26/04 (0)

Re: Help! LL1676 - what did I do wrong??? - arend-jan 03:30:14 04/26/04 (0)

Re: Help! LL1676 - what did I do wrong??? - arend-jan 00:52:20 04/26/04 (0)

Re: Help! LL1676 - what did I do wrong??? - KevinC 18:46:45 04/25/04 (0)

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