Resistor placement

[Diverted]

I just built this board yesterday, and now that I’m looking at it in real life I’m wondering if the 6V6s’ cathode resistor at far left is too close to the diodes. Should I move it just left, off the board? Worried about heat.
Please excuse the patchy soldering. I just did light solders to hold the stuff in place.

Thanks!

[shooter]

i'd hold off til you do the math once its running, you might be changing it anyway.

[Diverted]

Yeah that is true. I think it’s close though as it’s pretty much same circuit and same transformers I used in another build. Thanks.

[sluckey]

Proximity to diodes is fine. I'd raise it higher off the board though.

[Latole]

The 10 watts cement resistor ?

IMO it is too close to the board to best heat dissipation

[kagliostro]

Can you swap the ceramic resistor for one with alluminium shield ?

If so you can put it on the chassis via the mounting holes, heat problems vanisched

Franco

[Latole]

The idea is not bad kagliostro.

Personally I wouldn't do it:

1- It would undo the “vintage” design of the circuit
2- More work to install.
3- The price is higher for this part than the 10 watt cement which will do the job perfectly if properly installed

[kagliostro]

I can agree with you Latole

but it is the way I see to save the situation at this moment

On the photo I see that the cathode resistor is under a plastic component (the pilot light) that is installed on the faceplate of the amp

if you keep the resistor where it is the heat is going easily to the board

but if you rise it the heat will go more easily to that component and may be it will demage

This is how things had to be done and this way there would be no problems increasing the resistance height and maintaining the vintage look (and also shorter wires to the pot that this way keep more far from PS section)



but this time the eggs in the basket have been broken and the solution, I admit, can solve the problem but not save the a full vintage aesthetic

---

However with a small piece of alluminium sheet he can arrange a mout to fix the ceramic resistor to the chassis having only to lengten a bit the leads

or he can use a terminal strip and maintain the vintage look



Franco

[Latole]

IMO resistor need only 1/8 inches space or little more if Diverted can .

it will still be very far from the pilot lamp which is made of resistant material