GM70 Justification

[IslandPink]

Nothing big, Phil . I have the two pairs of 2A3 outputs Bud made me ( you heard the Full-range level '2.5' ones on the KR300B amp at the weekend ) and Dave Slagle's amorphous-C-core 3K ones for 300B ( which I might sell ) .

Bud did mention that Erick hasn't used the level 1 transformers yet ....

If James's numbers are correct , I could probably trial this stuff with a pair of GK-71's through the Slagle outputs with the new shunt supply, turned-up a bit towards 500V . I think in the end , though , I'll be using copper GM70's and it would be worth forking out for some 'level 2' Bud ones as per above . I managed to claw back almost enough cash for these, from stuff I sold at Owston

Oh, I didn't mention that Bud and O-Netics may only be making audio stuff for about another 3 years .

Oh yes, Phil - what sort of problems did you have with the Coleman supplies for GM70 ?

[IslandPink]

I may knock up a GK71 copper gm70 graphite GM70 212 and 211 test bed all run at about 1kv from a superlative power supply for next Owsters and have you all blind tested. Write your views on valve 1 valve 2 etc.

Sounds like a huge amount of fun .

I already done it to Nick on his own. It was a fruitful experience, 212 was king, Copper gm70 almost a 212 in character, so close you could barely call it.

Well, what can I say - there's now zero chance that this amp won't get built

[pre65]

I'n not so sure the copper GM-70 are much better than the carbon ones at lower voltages.

I tried some of Colin's spare ones (worn out ?) in my amp at 600v HT and could not tell any difference.

Perhaps Andrew can have another try and see if he can tell the difference in his amp ?

[andrew Ivimey]

Oh very well... when I've finished parking the cars. I suppose you will want me to put my head in a bucket of water. I have one ready. I think you ought to know I'm feeling very depressed. It is time Anyway to hook down the 801amp and modify the phase splitter with Mr Lundahls finest in the 2A3amp but right now I'm listening to chic corea!

[Paul Barker]

Actually I should probably focus on my push pull exploration. When the tube tester comes, see if I have 4 pieces close tolerance 45.

[pre65]

Oh very well... when I've finished parking the cars.

.

Here is 6d (sixpence) for your trouble.

[Paul Barker]

[Dave the bass]

Oh very well... when I've finished parking the cars.

.

Here is 6d (sixpence) for your trouble.

Pssssstttt.... Its a reference to HHGTTG Phil. Marvin the robot (with a brain the size of a planet) ends up in the car park (parking cars).



So many great quotes in a 4.11 clip.

DTB

[ed]

'looks like a fish, moves like a fish, steers like a cow'


mmmmmmm that Sandra Dickinson, corrrrrrrr!

[Dave the bass]

"I'll be down in a minute"...Zaphod

"....that makes two of us..." Marvin.

Brilliant.

DTB

[andrew Ivimey]

the second 10 million years, they were the worst too!

priceless.

[Ali Tait]

Pass the rap-rod, plate captain!

[IslandPink]

Just bought myself a Birthday present :
"A birthday present from Tashkent"
Copper is a good investment, as we know .

[Paul Barker]

Nice.

These Pentodes might bias up as triodes like 833a for all we know. Much cheaper than 833a's.[/url]

[pre65]

Nice.

These Pentodes might bias up as triodes like 833a for all we know. Much cheaper than 833a's.[/url]

The filament wattage is a bit mightier than 833a.