Quickie Down

[brucef]

I could not leave well enough alone. Built the Quickie and it worked well out of the gate. Added the pjccs and again, all went well and the little pre was singing. After a month or so I decided to upgrade the 150uf caps and the 2.2uf caps. Went with Black Gate 220uf 16v caps and Mundorf Supreme for the 2.2uf caps. Whie removing the 150uf caps I broke one lead off of one of the 107k resistors so I bought a couple of new ones from mouser. Got everything put back together and I have no sound. Voltage checks as follows:

1A and 1B - 38 volts
A6 and B6 - 35 volts
A5 and B5 - 15 volts

Checking the output rca on one side it looked like I had put too much solder in the cup and it had flowed down and was perhaps shorting out, so I bought 2 new ones and replaced both. Still getting the same voltage readings and still no sound. I rechecked my connections for the parts I replaced and everything looks like it is in order Perhaps some bad solder joints?? I also replaced all of the batteries with fresh ones and swapped out tubes. Help!!

[Natural Sound]

You made a lot of changes. You need to get back to what worked before. If it were me I'd put the stock caps back in. If you get sound at that point then swap in one pair of "upgrade" caps, test for sound then replace the second pair.

[mcandmar]

What resistors did you buy?   They should be 1.07k not 107k.

[brucef]

What resistors did you buy?   They should be 1.07k not 107k.


Uh oh. They are 107k. I really have no electronic experience. I thought 1.07k and 107k were one in the same.

[mcandmar]

It is 1,070ohms Vs 107,000ohms 

The markings on those dale resistors can be a little confusing, best to refer to the bill of materials/schematic in the manual.

[brucef]

Thank you! I am assuming that this is my problem. I will replace them and see what happens.

[brucef]

Happy to report that the little Quickie is back up and running! Note to self: Don't use a 107k ohm resistor in place of a 1.07k ohm resistor. I guess making a few mistakes is how you learn.

[BNAL]

I guess making a few mistakes is how you learn.

So true. I just want to know when I'm going to stop learning, because I'm still making mistakes.

[Paul Birkeland]

Happy to report that the little Quickie is back up and running! Note to self: Don't use a 107k ohm resistor in place of a 1.07k ohm resistor. I guess making a few mistakes is how you learn.

That's a pretty innocent mistake to make, and not at all harmful to anything in the kit.  We have had a few customers over the years replace the 270,000 Ohm resistors we use to bleed off our high voltage power supplies with 270 Ohm resistors.  In a kit like the Crack, the high voltage supply usually is asked to deliver 0.065 to 0.085 amps of current, with the 270 Ohm resistor installed by mistake, that draw goes up close to 1A, and things begin to sizzle.