coiled component leads in valve amps

robinbowes · January 24

I was watching a youtube video from @RiftAmps in which Chris goes through a Pro Reverb amp and highlights some of the issues with it (linked below). At about 7m43, he points out some component leads that have been coiled in an unusual way.

I found something similar in a Marshall I repaired recently, although not as neat and tidy:

Image: https://lh3.googleusercontent.com/pw/ABLVV85cuVZVVK-yKSTi_Diaq8x1rYrWpnWjnp5Kncnopvbc5mUEpHpRqXKtlMWAz6P1XAJ6qLESWi9XJUnydLlDijfvmKGXX5Asf046Y1MQ0zXE3S654JVtXogHRYT73Tyaxt3PGyoHgTbN6CNRpbIR-PW41w=w782-h1042-s-no-gm

I guess the idea must be to add some sort of shock absorption to protect the solder joint, but I can't see why that would be necessary for small components.

Ah well!

ElectricXII · January 24

Also possibly to raise them off the board to avoid them getting cooked?

Kurtis · January 24

They couldn't find their snips?

robinbowes · January 24

ElectricXII said:

Also possibly to raise them off the board to avoid them getting cooked?

You can do that without coiling the leads.

Kurtis said:

They couldn't find their snips?

Heh, possibly.

ICBM · January 24

The only thing I can think of is an idea that it might help protect the caps from the heat when soldering the wires a bit, just because the heat will have to conduct further... but it's not really an issue anyway if you can solder properly.

Otherwise it looks pointless.

robinbowes · January 24

ICBM said:

The only thing I can think of is an idea that it might help protect the caps from the heat when soldering the wires a bit, just because the heat will have to conduct further... but it's not really an issue anyway if you can solder properly.

Otherwise it looks pointless.

The example in the Rift video shows the same thing with resistors.

jasonbone75 · January 24

Paul Reed Smith probably told them it improves the tone...

Keefy · January 24

It’s a good idea to protect components from mechanical stress when soldering their leads but that seems excessive.

MartinBush · January 24

You might do that sort of thing when installing component in something like a valve radio where tag strips are used. I wonder if those components had for some reason been prepared for a similar use, but then ultimately used in a different setting.

thermionic · January 24

The extra inductance helps reduce ripple on the dc supply.

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coiled component leads in valve amps

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