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Old 15th January 2007, 11:20 AM   #11
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Default Re: Radford Batteries ...

Quote:
Originally posted by torroid88
Good enough for a "dead or alive" test though !

Good Luck !!!
Interesting link as I did not think such a cell was available anymore. If it works well, I'll build a power supply for certain.

Thanks,

Shawn.
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Old 15th January 2007, 09:02 PM   #12
latala is offline latala  United Kingdom
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Those cells are PP9 over here(uk) and are still available !
Nice to look inside the radford typical build quality for them !
I have a zd22 preamp and a large [power amp of theirs and the build style is very similar.
regards Trev
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Old 22nd November 2007, 08:59 AM   #13
big jim is offline big jim  England
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hi tom i have the manual if you still need it.

all the best jim
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Old 22nd November 2007, 11:42 AM   #14
AuroraB is offline AuroraB  Norway
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If that manual also contains the schematics, I would be very interested in seeing a pdf of that manual, as the oscillator appears to be among the very best..........

and Tom - I think you should seriously concider getting those batteries, as they probably plays a rather important role in keeping the noise floor all that way down. ( Rechargeable 9Vs could be another way...)
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Old 22nd November 2007, 04:01 PM   #15
AndrewT is offline AndrewT  Scotland
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Quote:
Originally posted by AuroraB
I think you should seriously consider getting those batteries, as they probably plays a rather important role in keeping the noise floor all that way down. ( Rechargeable 9Vs could be another way...)
and completely isolate the charging system, including ground, before connecting the analyser to the circuit under test.
Maybe a TRS jack plug & socket that prevents insertion of input/output plugs until you've disconnected the charger.

Even the face plate looks worth $50.
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regards Andrew T.
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Old 22nd November 2007, 04:17 PM   #16
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I have some equipment that uses a bunch of #246 9V batteries, a bit smaller than your behemoths. Curious, I carefully opened the bottom of the box to see what was inside. Amazingly, there was a little circuit board with the exposed terminals on top, a couple perfectly standard 9V batteries plugged into terminals on the bottom, and a wood spacer to take up the rest of the space! You probably won't be as lucky, but I can now just plug new 9V batteries into mine, which is about 10X cheaper than buying new #246 batteries. I didn't know one could parallel batteries, but if the voltages are matched, it obviously works. Might be a way to run your unit, as it would probably exhaust the normal size batteries very quickly.
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