audio-talk

I’ll start new plans to go off board with the power supply. This chassis is too small and the power supply is so important I can’t compromise with it. Actually the rediculous thing is the 630v capable power supply Im using with the EL34 stand alone amplifier would become surplus when the GM70 amp is...

Its not going to be easy. The tin caps arent whats going in. The plastic ones are smaller diameter. https://i.postimg.cc/bNP7FZ9j/IMG-1196.jpg https://i.postimg.cc/L8CGXNKH/IMG-1197.jpg https://i.postimg.cc/MHmF8YmJ/IMG-1198.jpg https://i.postimg.cc/LXfWxSqX/IMG-1199.jpg But it may be possible,

My careful planning has got me thinking about valves. We like to see them on top, we are like male peakocks. Im not saing yay or nay. But when all caps are here, I shall see how the extrenally mounted components goes. Amaybe all the caps fit above, all remaining chokes and transformers fit above. Ma...

I found a wooden thing in £ shop yesterday. My caps haven't arrived. But it appears I shall have to put as many as I can fit standing tall on top, because they arent the best thing to put inside as their volume is great and the amp case isn’t spacious, I have anther power choke two filament transfor...

Study time, I've got my Foundation (Radio, not Cosmetics OK) exam at the end of this month so I'm getting stuck into these...


Im intermediate but I sold my rig

Is vintage silver mica good?

Homemade kathode caps

I had a close look at youre underside to see if i could get tips on mounting components when I saw more electrolitics. https://i.postimg.cc/76wWrzBM/IMG-1188.jpg Kathode bypass. Both stages. You know the caps with a nut t mount them. Mine are going on the base cover and chokes and transformers. I th...

The news update is I miscounted Anode chokes. There are 3 per channel. No need to worry, I think I have enough.

Don’t forgot clocks go forward so we’ll have one hour less rain!

To get the 860VCT voltage to the B+ desired a 40v 50 watt transformer is connected in series with the 230v primary of the b+ transformer on my 243v mains supply. Here is the signal section sketched out. https://i.postimg.cc/fLStNMCw/IMG-9196.jpg I miscounted anode chokes or left 2 in man shed. Do yo...

One birthday when I was long term sick my wife asked me if I wanted a track day. “ I said “not while I’m like this”! I never had that present.
My uncle says “if someone offers you something, take it; because they may not offer it again “!

I might make a nickel core impedance matching pair of autoformers so this is a complete 1.9 wat SET amplifier aswell. The autoformers potted with in and out connections to inter connect from output of this driver to speaker wire for every day listening. Call it a energy saving hybrid like the cars.

How about this layout. Imagine the new plain stainless top plate.Items mounted on top as seen. The capacitors same mounting bolt through side as pictured here on the EL34 amp. Two filament transformers and one more choke concealed inside. Rectifiers slow start because indirectly heated. Other than t...

Ordered four 80 uF caps and two 4uF caps for this chassis. Two 80’s for power supply two for cathode bypas the two 4’s are the ultrapath power supply noise cancelling cap from cathode of el84’s to b+. Total cost £50 from same seller I last used who is a UK stockist . Shipping free this size order an...