New Foreplay build Questions

[2wo]

I you still have the SW that you just replaced. You can use it as a 15K variable resistor to experiment with...John

[mchurch]

Mike,

If any of the diodes you have tell you what current they draw we can calculate the series resistor easily.

Grainger49, I am going to take a look a potential candidates for LED later this evening I will look for their current draw.

Thanks

Mike

[ajp]

Hi, I just completed the soldering potion of the build. But I notice that I never read, that I should solder the drain wires to 28U. Have I missed that in the instructions. That seems wrong, won,t they move around etc.

[Laudanum]

Hi, I just completed the soldering potion of the build. But I notice that I never read, that I should solder the drain wires to 28U. Have I missed that in the instructions. That seems wrong, won,t they move around etc.

If I recall, there were one or two minor misses in the FPIII manual.  That seems to be one of them, from memory.   Yes, they should be soldered. 

[ajp]

Thanks, that's what I though.

[ajp]

Hi, My OD3 is glowing but the 2 12AU7's don't. I'm getting only 2.3 VAC  on 4, 5 and 123.5 on 6 of the transformer terminals. The wiring looks good. Any ideas?

Help

Al

[Paul Joppa]

Check the orientation of the diodes and the capacitor back there. It has been a source of difficulties a few times. If there is an error, check the diodes and inspect the capacitor for signs of swelling - they may have been damaged.

[ajp]

Thanks Paul. When looking at the capacitors I found a solder I just plain forgot. All the tubes are glowing.

Back to testing

Al