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Hello,

I have an issue with my vintage 1974 DR103, when I turn on the mains switch, sometimes, not always, it turns on and immediately off.
If I turn off and on the switch a couple of times, it works.
- Is it bad Mains switch?
- Does it need recap (the amp is still in its very original condition).
- Is it bad contact in tube sockets?
- Nothing of the above?

Thanks in advance!

does a fuse blow?
if not, I think the switch is faulty and needs replaced

Dr.HI-TONE wrote:does a fuse blow?
if not, I think the switch is faulty and needs replaced

No, fuses are ok.

So, I am looking for new switches
Can I find completely identical switches in the emporioum?

Thanks for your quick answer Dr.

Fanedango wrote:http://www.ebay.co.uk/itm/Hiwatt-And-So ... 3a8a4a3c9a

They seem 3-way switches, as I can see, they have 3 couples of pads.

I wonder if the old switch nuts match these switches from Hi-tone website:
http://shop.hi-tone-amps.com/Toggle-Swi ... -Arrow.htm

And maybe is a good chance to do a recap in the amp. All of the Can capacitors have a bulge sign, they need replace, don't they?
I would like to keep the amp as original as I can but I think the recap is mandatoty..


One last question, the Hi-tone recap kit as I can see in the picture, has 3x F&T at 385VDC, 1x F&T at 500VDC and 1xARS at 500VDC.
My Hiwatt has 3x RS at 350VDC, I assume that the voltage difference isn't important between the F&T and RS.

Iliaspap wrote: I wonder if the old switch nuts match these switches from Hi-tone website:
http://shop.hi-tone-amps.com/Toggle-Swi ... -Arrow.htm

I have used those on vintage amps with no issues.

Iliaspap wrote:All of the Can capacitors have a bulge sign, they need replace, don't they?

For certain the green one, which has oozed some stuff through the relief bulge. Given the age, replacing all would probably be a good idea.

Iliaspap wrote: One last question, the Hi-tone recap kit as I can see in the picture, has 3x F&T at 385VDC, 1x F&T at 500VDC and 1xARS at 500VDC.
My Hiwatt has 3x RS at 350VDC, I assume that the voltage difference isn't important between the F&T and RS.

Higher voltage is actually better, in this case.

Dave

yes, Dave is correct.

This one then?

http://www.ebay.co.uk/itm/2-Interrupteu ... 566141eafe

No, those are single-pole, single throw switches, the type mostly used by Fender. You want a double-pole single-throw switch, the type with solder terminals on each of the four corners.
--mark