CV2799

Dave the bass · Post by **Dave the bass** » Wed Nov 14, 2012 4:27 pm

Mike H wrote:You have lists?

He's retired Mike.... 'they' do this kind of thing...

DTB

andrew Ivimey · Post by **andrew Ivimey** » Wed Nov 14, 2012 5:16 pm

a list? - that's a good idea. Perhaps I can build one into my life style; could be really useful.

Now, where do I begin?

Dave the bass · Post by **Dave the bass** » Wed Nov 14, 2012 5:20 pm

andrew Ivimey wrote:a list? - that's a good idea. Perhaps I can build one into my life style; could be really useful.

Now, where do I begin?

I'll start it for you MrI.

A.

AC/DC.
Adenoids.
Aliens.
Amphetamines.
Apples.

B.

Bicycle.
Blues.
Bongs.
Boobies.

(etc etc etc).

Hope this helps.

DTB (Lifestyle Guru).

andrew Ivimey · Post by **andrew Ivimey** » Wed Nov 14, 2012 6:27 pm

Carapace
carpark
canine
cant

ah yes, I get the idea. I think I'll write a dictionary!

discombobulate
directionality
durable
dismal

I'm getting rather good at this

shane · Post by **shane** » Wed Nov 14, 2012 7:23 pm

I'd rather spend a day exploring Dave's Bs than Andrew's Ds.

Interesting little revelations, those.

E:

Eglantine
Eroticism
Epsom (Iwas born there)
Esperanto

pre65 · Post by **pre65** » Thu Nov 15, 2012 10:59 am

Eh up lads, it's working again.

The CV1285 (6N7) transplant has been accomplished. There were a few moments (pratt of the week award sort

) with wires in the wrong place and trying to get the anode voltage closer (downwards) to 250v. Got 246v at the moment so that part was achieved.

Now, the gain of CV1285 is less than the previous trioded C3g, and the volume pot is nearly on maximum to get room filling sound. I'm just playing a few CDs to get a feel of the sound before I go out, but it certainly has not lost anything, if anything it's a miniscule gnats gentlemans sausage better.

So, amp is back in action and I'm pleased with the result. Magic.

pre65 · Post by **pre65** » Thu Nov 15, 2012 11:16 am

One thing I've just realised, there is no grid leak resistor on the CV1285.

What would be a suitable value ?

Shall I try 1M to start with ?

Cressy Snr · Post by **Cressy Snr** » Thu Nov 15, 2012 11:40 am

pre65 wrote:One thing I've just realised, there is no grid leak resistor on the CV1285.

What would be a suitable value ?

Shall I try 1M to start with ?

As the 6N7 and its variants such as the 6A6 are class B driver and power valves, with a possible 10W power output, I would not be using a 1M as a grid resistor.

Try a 100K or thereabouts instead Phil.

pre65 · Post by **pre65** » Thu Nov 15, 2012 11:44 am

SteveTheShadow wrote:
pre65 wrote:One thing I've just realised, there is no grid leak resistor on the CV1285.

What would be a suitable value ?

Shall I try 1M to start with ?
As the 6N7 and its variants such as the 6A6 are class B driver and power valves, with a possible 10W power output, I would not be using a 1M as a grid resistor.

Try a 100K or thereabouts instead Phil.

Cheers Steve, I'll try that tomorrow.

If I was brave enough perhaps I could try designing a 3 stage version with (perhaps) the 112a as the first valve.

Mike H · Post by **Mike H** » Thu Nov 15, 2012 6:22 pm

andrew Ivimey wrote:discombobulate

pre65 · Post by **pre65** » Thu Nov 15, 2012 11:39 pm

The 100K grid leak resistors have now been fitted.

If I were to experiment with an input transformer (say 1-2 step up) are there any pit falls to be wary of ?

andrew Ivimey · Post by **andrew Ivimey** » Fri Nov 16, 2012 8:28 am

More cuts, more mistakes, more frustration and 'Miller' - However that should not stop you - oh yes and impedance issues but that wouldn't stop me.

What sttops me is the appalling mess that was my home ... blah blah blah ... weeps quietly in a corner.

ed · Post by ed » Fri Nov 16, 2012 10:05 am

andrew Ivimey wrote:More cuts, more mistakes, more frustration and 'Miller' - However that should not stop you - oh yes and impedance issues but that wouldn't stop me.

What sttops me is the appalling mess that was my home ... blah blah blah ... weeps quietly in a corner.

Yo omib,

we have heard much of this wailing apropos the demise of chez toi.....I for one am now frustrated as the prose is less than descriptive....can I/we have some photographic evidence to support the wailing and perhaps then lend some sympathy...pretty please

simon · Post by **simon** » Fri Nov 16, 2012 12:45 pm

Mmm, I can't help thinking that when Andrew does finally have some semblance of normality at home there will be a voracious and vigorous unstoppering of the creative cork that has plugged his youthful conduit for so long...

pre65 · Post by **pre65** » Fri Nov 16, 2012 12:49 pm

simon wrote:Mmm, I can't help thinking that when Andrew does finally have some semblance of normality at home there will be a voracious and vigorous unstoppering of the creative cork that has plugged his youthful conduit for so long...

Blimey, you have a way with worms (sic) Simon.

audio-talk

CV2799

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