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In Reply to: preamp desing using Hammond 124B posted by PeterS on December 18, 2005 at 07:25:43:
I had used the Hammond 124B as per John S's circuit as an input step-up Tx, but haven't had any chance with it. Very difficult (if possible) to get a flat frequency response out of it.Have a look at the following thread.
After taking the 124B out of the circuit, I made an extensive testing of it (on the bench, using a signal generator and an oscilloscope) and found that it had a very irregular frequency response. I tried various loading schemes (from 10 kohms to 220 kohms) but could not get a flat FR. I cannot remember the findings, this was done a month ago and I didn't keepany notes of the results I got.
Evangelos
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- Re: preamp desing using Hammond 124B - kenev 23:11:12 12/19/05 (0)
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