50 watt wiring question

Billy Batz · Post by **Billy Batz** » Sat Mar 26, 2005 9:30 pm

I emailed you scott but basically it doesnt matter which side of the board is the 'earlier' side of the B+ rail. As long as the connections that should be together go on the same side. I think the typical way to do it is have the screens (wire to filter caps, choke and ouput tubes pin4s[pin6s]) on the front panel side and the V3 (wire from filter can and board jumper to the ttwo 100k/82k resistor junction in the PI) on the side of the chassis near the rear panel.

Trem Abuser · Post by **Trem Abuser** » Sun Mar 27, 2005 12:45 am

Thanks you guys. Billy, I got your e-mail but neglected to respond. Thanks for the tip.

Scott

Trem Abuser · Post by **Trem Abuser** » Mon Mar 28, 2005 12:12 am

On the notated picture, on the turret for the .022 cap in the very middle of the board (just left of the three resistors joining on one end), the turret on the southern end of the board gets connected to a "purple wire to treble pot, pin 3."

However, on the wiring guide, that same turret gets connected (with a purple wire) to treble pot, pin 2.

Which one is right?

Flames1950 · Post by **Flames1950** » Mon Mar 28, 2005 5:25 am

Pin 2 is correct. Pin 3 runs over to the Bass pot per the schematics.

Trem Abuser · Post by **Trem Abuser** » Mon Mar 28, 2005 12:06 pm

Thanks Flames. If its not too difficult, could you briefly explain how you can determine that looking at the schematics? I'm still at the "duh" stage on the schematics.

Flames1950 · Post by **Flames1950** » Mon Mar 28, 2005 12:28 pm

On the symbol for that treble pot the middle connection with the little arrow on the end is the wiper, and the wiper is the middle lug on your pot physically as well. The first lug we know goes to the 500pF (250pF if you do a JTM45/Bass) treble cap. That leaves your third lug that goes down and connects to the bass pot.
Having said that, don't get fooled now looking at something like the bias trim pot. Remember how it's wired, with the third lug shorted to the wiper with buss wire on your turret board. That's why it's drawn as if there were only two connections, because the third connection is shorted to the wiper.

Trem Abuser · Post by **Trem Abuser** » Mon Mar 28, 2005 7:04 pm

Billy Batz wrote:I emailed you scott but basically it doesnt matter which side of the board is the 'earlier' side of the B+ rail. As long as the connections that should be together go on the same side. I think the typical way to do it is have the screens (wire to filter caps, choke and ouput tubes pin4s[pin6s]) on the front panel side and the V3 (wire from filter can and board jumper to the ttwo 100k/82k resistor junction in the PI) on the side of the chassis near the rear panel.

What do you guys recommend at that location - two 100ks or 100k/82k?

Is this the part on the schematic the two resistors coming down from the path between the two 10k/1W resistors and the 50uf of filtering? (That would indicate 100k/82k as my answer?)

Trem Abuser · Post by **Trem Abuser** » Tue Mar 29, 2005 7:41 pm

Trem Abuser wrote:
Billy Batz wrote:I emailed you scott but basically it doesnt matter which side of the board is the 'earlier' side of the B+ rail. As long as the connections that should be together go on the same side. I think the typical way to do it is have the screens (wire to filter caps, choke and ouput tubes pin4s[pin6s]) on the front panel side and the V3 (wire from filter can and board jumper to the ttwo 100k/82k resistor junction in the PI) on the side of the chassis near the rear panel.
What do you guys recommend at that location - two 100ks or 100k/82k?

Is this the part on the schematic the two resistors coming down from the path between the two 10k/1W resistors and the 50uf of filtering? (That would indicate 100k/82k as my answer?)

Anyone?

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50 watt wiring question

Discrepancy