November 6, 2013 at 1:25 pm #15865
Thanks Ted…that gives us another avenue to explore.
I’ll keep you posted!November 6, 2013 at 6:47 pm #15866
would you be kind enough to send a flow chart and schematic to my e-mail?
we dont think it’s the leds or cell and want to check the chips out next.
We want to swap the left and right chips to see if the problem follows. And it is a 9db difference when compressing
only. signal passes evenly when it’s bypassedNovember 6, 2013 at 10:18 pm #15867
I will send the circuit information direct to your email.November 6, 2013 at 10:22 pm #15868 Thanks!November 7, 2013 at 1:07 am #15869 We replaced most of the chips and the problem persists. It may be one of the light sensorsNovember 7, 2013 at 9:45 am #15870 I pointed out in my posting yesterday that if the compressor is working at all, then the problem is the gain cells, there is no point in changing chips.. The type of gain cell is ORP12 and these are available in the US or from me.November 7, 2013 at 3:48 pm #15871 Yes you did point that out. We were just in a chip changing kind of mood I guess!November 7, 2013 at 4:36 pm #15872 ok I’ll take a pair please..how do we proceed?November 7, 2013 at 4:51 pm #15873 OK, will email.January 11, 2014 at 6:02 am #15874 Ok we installed the light sensors and we still have exactly the same issue..a 9 db difference in channels.
So we tried everything we could think of and now..I guess I have to send it to England.
Please adviseJanuary 12, 2014 at 5:43 pm #15875
I’m sorry that you still have the problem….. it’s such a pain to have to send it over to me….. But I’m very happy to fix it if it is still broken.
Just send it to me at The Sound House, Hunsdon Road, Torquay TQ1 1QB, UK.
Make sure to mark it as equipment returned to manufacturer for servicing (not strictly accurate, but who cares!) And put a low value on it to avoid any possible problems with customs.
I will be in touch by emailJanuary 12, 2014 at 5:50 pm #15876
Ok thanks..I’ve run out of options here….Please e-mail me I have another question.January 15, 2014 at 3:28 pm #15877 To other readers of the forum….. I will post the results of this one once I have looked at the SC2.August 1, 2015 at 2:14 am #15878 Hi Ted I need to talk you you in a private message
thanksAugust 3, 2015 at 1:42 pm #15879
Just a note of caution about the early SC2 compressors….. The LDRs (Light Dependent Resistors) used to produce the compression do have delicate termination wires and can break. The cells can also deteriorate eventually (although I’m using some that have been in service for nearly 50 years… so they are not that bad!)
The electronics in these compressors is quite basic and rugged and the most likely cause of any defect is the gain cells (LDRs)
L/R gain differences are often noted and these are caused generally by inequalities in the tracks on the gain controls, usually the input gain control.
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