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Sony TA-F6B VU Meters Please Help

SYK3S

SYK3S

Active Member
Hi guys my sony ta f6b has developed a fault with one of the vu meters upon closer inspection I removed the vu meter and can see all the spring in side is busted im really sad can anybody chime in as to whether I can get it repaired or any fellow ak ers may have a spare laying around kind thanks in advance
Sykes
 
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spring loaded? It's shot.

but how important are they.. unless you want to look at them. Not usually accurate unless high end.
 
Binkman said:
spring loaded? It's shot.

but how important are they.. unless you want to look at them. Not usually accurate unless high end.
Click to expand...

Thing is its a lovely amp and I have matching tuner n tapedeck ant turntable so would like to get some replacements
 
If you can find a replacement meter movement, you may be able to salvage that one. It's fine surgery to do but the old needle can be remounted on a new movement, and that movement can be adjusted via resistor to match the good one so they display the same for a give input voltage.

You have the advantage of a good working meter that you can measure to get the resistance & voltage measurements from (i.e. how much voltage required to drive the meter to full scale). That info can be used to identify which "standard" value movement is the best replacement.

Unfortunately, I lost my one resource for doing that kind of work recently and haven't found another one, but I think the parts and expertise is still out there somewhere.

John
 
if you find a correct sized and oriented meter you could change the display card if different .. i think i have one but maybe you are too far away .. i have a sony amp with a bad meter i know the feeling that one is still waiting was all my fault too . . cant remember model right now .
 
It's probably easier to put a new movement into the same housing w/display card, attach the original needle. Fine detail work but then you have all the original components as far as mounting, display, needle etc. A lot of movements mount very similarly, so finding one that drops into your meter housing may not be that difficult (not sure, I haven't developed sources for those parts yet but in the one example I know of it was fairly straightforward to match the movement mounting).

Then you add the correct value resistor to ensure the meter matches the original for same displayed level for a given input voltage.

The other variable is drive current, for instance 10mA movement vs. 100mA. One will give you much more dynamic movement on transients than the other, even if they match perfectly on static input signals after the resistor adjustment.


John
 
Hi Guys The Meter Is Totally Toast Even Needle If I Can Get The Card Out (God Knows How Without Ripping Or Bending It) Then The K Series Sony Tapedeck Looks The Same Also TA -F4 F5 F7 Amp Meters Look Same
 
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