Can I reduce gain ?

[Deafyet]

Sorry, on the Volume pot.

 

[Paul Birkeland]

7.5K resistors would go between L-in and the white wire, and another between R-in and the red wire.

3.3K resistors would go between L-in and GL, and another between R-in and GR.

 

[Deafyet]

Great, thx again. Pray for me

 

[Deafyet]

I think i installed these padding resistors correctly, but am getting almost no gain now, even cranked all the way up.

(Please forgive the giant 5watt resistor, Parts Connexion shorted me one 3.3r. It will be replaced with a matching part.)

 

[Deafyet]

Test voltages were aok. LEDs are light up. No noise, distortion, or hum in what little signal there is.

 

[Paul Joppa]

You want 3.3K (3300 ohms), not 3.3R (3.3 ohms). The giant resistor made it easy to diagnose :^)

By the way, I noticed several solder joints that appear to be under-heated.

 

[Deafyet]

Ah geez, thanks. Can you tell me one joint in particular, so i know what to look for, I probably was too worried about overheating components. Generally, if they are shiny, they are good right?

 

[Deafyet]

BTW, i bought this piece used, so am only responsible for the upgrade kit, and padding resistors. I will try and reflow anything that looks cold.

This the first time i have ever touched a circuit board with an iron, so i greatly appreciate the help, thanks!

 

[Deafyet]

At least i can just pull the resitors off, and use the Pre until the new parts come. Just have to be really careful with that knob.

 

[Deafyet]

This one is is pretty pewpy right? (Again, not my work. : )

 

[Jameson]

That one for sure sucks. I’d touch anything up that looks blobby or dull like that

 

[bucketofguts]

Just wanted to follow up and mention that after using those Harrison Lab attenuators, I wasn't happy with the sound of them, they just sounded a bit off for whatever reason. And I did try them in different positions.

I read an old post where it was suggested to pad the volume pot using 7.5 and 3.3 kohm resistors. I initially tried with some 1/2W I had on hand. I did have the 7.5 but no 3.3 so ended up with 3 resistors in series to get to 3.3. The result was excellent and I managed to get a much better range of travel on the knob and more importantly the audio was excellent.

So, I then ordered some 2W TKD resistors (less than $10 total) for permanent duty. Yes indeed they are overkill but I do like the meaty look of them. I laughed out loud when they arrived, I didn't realize they were that big. :-* I also recently installed Jantzen caps and NOS Sylvania 6V6GTY tubes and the Moreplay has never sounded better. It is stellar!

Someone post a new pic of the correct resistors in the correct locations please! Pretty Please!