desol
Well-known member
- Joined
- Jun 20, 2005
- Messages
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electrochronic said:Q : has anyone been able to locate a source for the original HS2051 Zener Diode for the TG Diode bridge ?
electrochronic said:Q : has anyone been able to locate a source for the original HS2051 Zener Diode for the TG Diode bridge ?
electrochronic said:What TG Board version are you working with , Fester or other ?
The transistors are tested prior to shipping , but I always identify
pin leads and test for beta prior to soldering in the circuit. This eliminates
tiresome trouble shooting of dead or problematic parts.
The 2N4898 & 2N4010 should not be lying against the PCB board and
insulators are required.
BC109 (NPN) - tab is closest to Emitter, middle pin is base , last pin is collector
BCY34 (PNP) - tab is closest to Emitter, middle is base, last pin is collector
BCY71 (PNP) - tab is closest to Emitter, middle is base, last pin is collector
Make sure the 2N4898 and 2N4910 have not been installed in the wrong PCB pad
One is PNP and the other NPN, and the pads are the same footprint for both.
Check to make sure all diodes are good and none are installed in reverse, I have seen
diodes that have had the band applied to the wrong end of the diode , even though the
diode works perfectly fine. If installed this way , it would be reversed and cause some
havoc in the circuit.
drask said:Hie,
I'm actually building a fester TG. I've a question.
for the meters can I use this : http://hairballaudio.com/shop/product_info.php?cPath=25&products_id=86
Thank's you
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