> The Hammond 1628SE OPT is suffering from the frequency at 16kHz for -4 to -5 dB's.
It is rated much better than that. http://www.hammondmfg.com/1627.htm
What makes you think it is the transformer, and not the driver or the test set-up?
It is rated much better than that. http://www.hammondmfg.com/1627.htm
What makes you think it is the transformer, and not the driver or the test set-up?
It is rated for that, but several measurements appear to show that it has a nasty dip a little past 10kHz.
An externally hosted image should be here but it was not working when we last tested it.
Depends on your budget. If you don't have much to spend, you could try the cheap hammonds (125ESE, FSE, etc). However I found they didn't sound great, ok but not great.
If you have more to spend, the lundahls or one electrons are reputedly good.
And then there's always silver wire magnequest...
As PRR inferred, the driver stage and speakers of the amp will make a huge difference. Go for a proven 45 design, and use efficient speakers.
If you have more to spend, the lundahls or one electrons are reputedly good.
And then there's always silver wire magnequest...
As PRR inferred, the driver stage and speakers of the amp will make a huge difference. Go for a proven 45 design, and use efficient speakers.
A long discussion on the 1628SE here:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=50003&highlight=
I also used them and regret James weren't available at the time. Don't know if these issues were addressed in later production runs.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=50003&highlight=
I also used them and regret James weren't available at the time. Don't know if these issues were addressed in later production runs.
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