ssg board question

[sergejfa]

can someone explain what it's for this resistor?

[AlvaroHN]

can someone explain what it's for this resistor?
[ATTACH=CONFIG]4209[/ATTACH]

Correct me if I am wrong, but looking at the picture I think those little resistors are in series with the neons.

best,

Alvaro

[min2oly]

Correct me if I am wrong, but looking at the picture I think those little resistors are in series with the neons.

best,

Alvaro

yes, they are there to help protect the neon. At some point, front end voltage wise... they are not necessary because the transistor will blow w/ or w/o them if the wrong end becomes disconnected.
Patrick A.

[Tom C]

when running at 12 volts WITH matched transistors the 4.7K resistors provides protection above the standard neon only. with MATCHED transistors that is.... because all the current is divided equally across the set. unmatched no dice either way be good to your trannies!!

Tom C

[sergejfa]

thx for your reply,very helpful

[sergejfa]

hi,watching scheme on complete advanced book I never saw a bridge rectifier for cap dump circuit,whether they may have a built-in capacitor module or i missing something?
and what it's for this diode? I know it's for common ground mode or generator mode only?
What can happen if I connect my cap dump without that diode?
thx..