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Old 21st January 2013, 10:11 PM   #31
Mr. dB is offline Mr. dB  United States
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Join Date: Dec 2003
Location: Arkansas
Quote:
Originally Posted by GentryBa View Post
what does "hizzy fit" mean?
It's sort of like a conniption.
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Old 2nd February 2013, 12:19 PM   #32
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hi!

@mr. dB:

oh, I see! thank you!

things are going forward on my preamp:
the layout from juma is working fine now, so I was working on the rest of this beast.


- 21 full C-controlled relais to switch in- and ouputs with 7 standard and 14 latching relais.
the 7 takamisawa standard coil relais are powered on for 100ms and setting the 14 latch types to on/off.
the idea is simple: no power on the coils while hearing music!
- you can choose all functions via alps encoder on the preamp or IR-controlled
- motor-controlled volume regulation (it has got four single potentiometers in it, and one I use for the C to get its exact position)
if you switch from tape (my revox B77 tape recorder has got a very small output signal) to cd, the preamp reduces the volume not to destroy the loudspeakers.
you can set up every input with its own volume, or disable this automatic function.

The C also controls the AC-supplys (r-core transformers)and the DC-ones via relais, and every other part in this preamp.

It is too much to tell, in the moment I'm waiting for the aluminium stripes to complete the housing and then sort all the wires and make it look cleaner.

Here a few pics from testing:

C-controlled in/ouput PCB with 21 relais:
Relais PCB for C controlled preamp - My Photo Gallery

testing on my F5 (in the picture you can see only one F5):
C controlled preamp for F5 - My Photo Gallery

chaotic, but I wait for the housing:
C controlled preamp for F5 - My Photo Gallery

best regards,
matthias
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