> Hello Rich, I don't recall exactly, but check if you can gain access to
>the pots inside through the rear ventilation holes. Connect an ammeter
>in series with supply line; turn pots. so both idle currents drop to
>zero (you should also have more way in VR's beyond real zero current),
>and then readjust to the current value you want, by adding this value to
>the latter global supply current (with zero idling current).
> Another and more precise method is to gain access to the final board,
>it's located under the filter board, and (both) under the bottom back
>cover (the rearmost one).
> Lift one end of 13.8 V supply to finals, insert ammeter, and adjust
>idling for finals; for the drivers, there's a soldered jumper, insert
>there your ammeter and adjust. I used this latter method in my 440.
>Manual tells about 200 mA for both stages, but I set 200 for drivers and
>400 .. 500 mA for finals.
>
** Thanks, Guillermo. More current for the finals makes good sense.
>
>Rich escribió:
>>
>> ** The TS-440S I use for driving a 2, 3-500Z amplifier produces more
>> distortion than the 3-500Zs. I want to increase the amplifier idling
>> current in the 440 to improve linearity. VR1 and VR2 apparently set the
>> idling current for the driver and final amplifier. Can anyone describe
>> how to gain accrss to the Final Unit PCB ?
>>
>> - Rich..., 805.386.3734, www.vcnet.com/measures.
>>
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>
- Rich..., 805.386.3734, www.vcnet.com/measures.
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