Ah thought sopre65 wrote:The OPT are 5K single ended, huge great things that I purchased for my 833a project.
CV2799
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#76
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
- pre65
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#77
I've had another C3g go dead on me, so I've only got 1 working now.
What's a good (preferably inexpensive) single triode with a similar gain to try. I have got a couple of D3a but they are getting a bit expensive these days.
What about those Russian pentodes that everyone was raving about when connected as triodes ? Can't remember the number.
Anyway, I've got the simple KT66 push pull filling in at the moment, it goes louder, that's for sure.
What's a good (preferably inexpensive) single triode with a similar gain to try. I have got a couple of D3a but they are getting a bit expensive these days.
What about those Russian pentodes that everyone was raving about when connected as triodes ? Can't remember the number.
Anyway, I've got the simple KT66 push pull filling in at the moment, it goes louder, that's for sure.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
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#78
4p1L very cheap.
Philosophers have only interpreted the world - the point, however, is to change it. No it isn't ... maybe we should leave it alone for a while.
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#79
4p1L very cheap.
Philosophers have only interpreted the world - the point, however, is to change it. No it isn't ... maybe we should leave it alone for a while.
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#80
That's handy, they use the same socket as C3g, and also they seem directly heated.andrew Ivimey wrote:4p1L very cheap.
Unusual for a pentode ?
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
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#81
I've a feeling they're not that similar though Phil, C3g triode connected has a gain of 40-odd, can't remember what 4P1L is , but much less as it's DHT? Might not be a problem to you though.
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#82
And it's NOT a 6.3v heater either.simon wrote:I've a feeling they're not that similar though Phil, C3g triode connected has a gain of 40-odd, can't remember what 4P1L is , but much less as it's DHT? Might not be a problem to you though.
Filament Voltage: 2.1/4.2 volts @ 650mA/325mA respectively
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#84
I could use my pair of 6N7 (not 6SN7) and parallel up the anodes and grids, the cathode is common.
At least I could get the amp up and running again without
A) waiting weeks for delivery
B) no cost option
C) cos I fancy it
D) there is no D (copyright Bedford towers)
E) it might sound better
F) why not ?
G) where's Nurse gone, I need the toilet (again).
At least I could get the amp up and running again without
A) waiting weeks for delivery
B) no cost option
C) cos I fancy it
D) there is no D (copyright Bedford towers)
E) it might sound better
F) why not ?
G) where's Nurse gone, I need the toilet (again).
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
- pre65
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#85
Actually, the anode load for the C3g was one of Mikes interstage transformers, so as the 6N7 anodes are in parallel the resistance will be halved, which should be a good thing ?
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
- pre65
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#87
No worry Mike, the whole ethos of this amp is about not knowing what I'm doing.Mike H wrote:C3G is that special one by Siemens innit? Can't find an equivalent that's like
At this very moment octal bases are in position and wiring up has commenced. Just got to find the 800R resistors that my list says are in stock.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
- pre65
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#89
Indeed I do, in fact not only have I got 800R but also some 778R, but I may go to 1K which is a bit more on the safe side. (5ma instead of 6ma).Mike H wrote:You have lists?
EDIT
My 800R are all in fact 778R
Last edited by pre65 on Wed Nov 14, 2012 4:01 pm, edited 1 time in total.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
- pre65
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#90
I've just slipped with the scalpel and invoked Ivimeys 3rd law.
Man who builds amps WILL spill blood.
Man who builds amps WILL spill blood.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)