Hartke HA3500 Bias

[Carlosraj]

Hi

I need some help with this amp. What is the bias setting for this amp. The schematic shows SVR302 as the bias pot, but it does not show the voltage or the bias points. Across which component or point do I take the bias voltage reading. One more issue is that, the transistors Q304, Q305, Q306 and Q307 are getting very hot when the amp is turn on. Is this normal, but the driver and power transistors are just warm. I amplifier is working fine, just what is bugging me is why just this 4 transistors are getting so hot. Please assist.

Thanks

hartke_ha3500_power_amplifier_sch.pdf

[x-pro]

Усилитель работает нормально, но меня беспокоит то, почему именно эти 4 транзистора так нагреваются. [ATTACH]n999743[/ATTACH]

Насколько они горячие? Палец держит температуру?
Ну а корпуса этих транзисторов способны излучать в работе почти 1 Вт .

The schematic shows SVR302 as the bias pot, but it does not show the voltage or the bias points. Across which component or point do I take the bias voltage reading.
[ATTACH]n999743[/ATTACH]

Set the voltage between TP301 & TP302 to (6-10)mV. With no signal at the input and no load at the output.