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by Paul Barker
Fri Mar 29, 2024 11:15 am
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

That will then leave the gm70 power supply to build and output stage. Seperates I think for easier transport. Then watch out when I get a vehicle I’ll be setting off with it! Noone will be safe.
by Paul Barker
Fri Mar 29, 2024 11:02 am
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

https://i.postimg.cc/SxbMyjp3/IMG-9165.jpg https://i.postimg.cc/J0ykhk0V/IMG-9166.jpg https://i.postimg.cc/ZYLgPvwF/IMG-9168.jpg So it should all fit to this chassis including its own power supply. The modern polypropylene caps are slimmer the ones pictured are cathode bypas in EL34 amp. I can moun...
by Paul Barker
Fri Mar 29, 2024 8:36 am
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

You are as usual, right to persist with me.. thank you? It is just much better for my situation, and it has every chance of being a great and powerful amp. A little less heavy. But not a lot less.
by Paul Barker
Fri Mar 29, 2024 8:30 am
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

Well I am not fighting for that valve :-). But a flat load line does wonders. Yes I see 15v peak to peak and its beyond the requirement and looking again at the el34 there is no saying that is any more linear but requires almost double the input voltage. We cant see the grid lines outside the box, ...
by Paul Barker
Fri Mar 29, 2024 8:28 am
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

Well I am not fighting for that valve :-). But a flat load line does wonders. Yes I see 15v peak to peak and its beyond the requirement and looking again at the el34 there is no saying that is any more linear but requires almost double the input voltage. We cant see the grid lines outside the box, ...
by Paul Barker
Fri Mar 29, 2024 6:29 am
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

I was thinking 200v 25ma but I agree more would be better. Hang on I’ll just have a look. Its nearly there, but starting to veer off linear at first sight.(though I havent measured the 2nd, and often its a surprise when I do) But since the EL34 has more headroom within better looking grid lines (di...
by Paul Barker
Fri Mar 29, 2024 5:16 am
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

That was years ago. I no longer remember what I was working on. I never built it. Shame I didnt take a photo copy of the fresh pages in the Vade Mecum then do my doodles on the copy. But I see what youre thinking. I usually prefer the sound of interstage without a resistor to load it. As I’m not dri...
by Paul Barker
Thu Mar 28, 2024 11:00 pm
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

But I appreciate the suggestions.

GM70 driving GM70 if I had a suitable choke or interstage. But the interstage is OK for EL34 and EL34 is OK in the role.
by Paul Barker
Thu Mar 28, 2024 10:51 pm
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

The driver has to swing 240v peak to peak, EL34 more suitable than EL84 especially the EL84 pinches up more trying to achieve the full drive voltage for full power in the GM70. EL34 fits the need. https://i.postimg.cc/hGTCQQKb/IMG-1183.jpg Not possible to get the drive swing without severe distortio...
by Paul Barker
Thu Mar 28, 2024 10:34 pm
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

Well theyre popular on ebay. Someone ‘s using them. Not cheap. Must be good. Probably the demand is they may fit in transmitters.
by Paul Barker
Thu Mar 28, 2024 10:20 pm
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

Amaising power but the transformers are 50mA.
by Paul Barker
Thu Mar 28, 2024 9:47 pm
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

E130L vary in price some are hundreds. I’ll look them up in vade Mecum
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by Paul Barker
Thu Mar 28, 2024 9:39 pm
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

https://i.postimg.cc/vZX87vWY/IMG-9155.jpg https://i.postimg.cc/kGxq2NJd/IMG-9157.jpg https://i.postimg.cc/Jh21v46S/IMG-9158.jpg https://i.postimg.cc/9MwWh5s0/IMG-9159.jpg https://i.postimg.cc/RhrvCpzR/IMG-9161.jpg https://i.postimg.cc/rFXpqsVk/IMG-9162.jpg The BOTTLE OF BEER WAS A BIRTHDAY PRESENT...
by Paul Barker
Thu Mar 28, 2024 9:39 pm
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

I’ll see if that valve is abailable also like el84. Arguably the best WAD amp. Ive just stripped out a Rosenblit amp that broke and wasnt made to work on. I didnt like the sound either. I have kept the filament transformer. Not sure about keeping the attenuator. Ive left it for now. Not sure if I ca...
by Paul Barker
Thu Mar 28, 2024 3:54 pm
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 36
Views: 826

Re: GM70 Monoblocks’

Position of instruments et al is their forte and Im loving it. Diana is aware of hr situation and her demensia isnt leeding to constant arguments at the phase shes at right now. And I cheish having her in bed every night. Its the most empty space on earth when shes in ICU……. Roxy the Staffie will ge...