Hi,
this thread has pics showing one pair of 40mF smoothing caps for the single channel amp. But some others are showing 2pair of 40mF in parallel, I presume still for one channel.
Can you confirm which models of KSA100 run with what smoothing capacitance?
this thread has pics showing one pair of 40mF smoothing caps for the single channel amp. But some others are showing 2pair of 40mF in parallel, I presume still for one channel.
Can you confirm which models of KSA100 run with what smoothing capacitance?
If you guys need a good source for the 2SC2240's and 2SA970's here it is....http://www.ampslab.com/trans_2sc2240.htm
exact model of fans used ?
and estimated rpm?
I can't find that info anywhere........and I'm chasing it just for reference,not for chasing origigi ones....
and estimated rpm?
I can't find that info anywhere........and I'm chasing it just for reference,not for chasing origigi ones....
Chartal said:
tnx.
if I remember correctly-in KSA fan is powered trough series resistor......
Indeed. Although I'd rather recommend getting a Papst one with lower airspeed. They've a huge range.
Attention KSA-100 Board WIKI Latecomers!
I have some extra boards and can accomodate at least the minimum amount of all your requests at this time. This would be for the Gold Plated boards. Not for the solder mask boards. There are only a few of those left and I have to save those as a just in case sort of thing. Those that requested any extras are listed below.... Please let me know this weekend if possible as I will be out of town starting Monday for two weeks.
Mark
Stuart Easson USA 2-10
Adusson SWE 2
Sts9fan USA 2
Sigurd Ruschkow SWE 2
daylne52 USA 2
Harry3 AUS 4
RAmandi MEX 2
I have some extra boards and can accomodate at least the minimum amount of all your requests at this time. This would be for the Gold Plated boards. Not for the solder mask boards. There are only a few of those left and I have to save those as a just in case sort of thing. Those that requested any extras are listed below.... Please let me know this weekend if possible as I will be out of town starting Monday for two weeks.
Mark
Stuart Easson USA 2-10
Adusson SWE 2
Sts9fan USA 2
Sigurd Ruschkow SWE 2
daylne52 USA 2
Harry3 AUS 4
RAmandi MEX 2
Paul,
No problem. I am doing this 1st come 1st serve till they are gone. I've e-mailed everyone except Stuart... can't find his e-mail for some reason or other but I'm sure he will see this post and I will hold a pair for him at least till he says yes or no.
GeWa, Did you get yours yet... I mailed them some time ago....
Mark
No problem. I am doing this 1st come 1st serve till they are gone. I've e-mailed everyone except Stuart... can't find his e-mail for some reason or other but I'm sure he will see this post and I will hold a pair for him at least till he says yes or no.
GeWa, Did you get yours yet... I mailed them some time ago....
Mark
Replace for current Source diode
Hi everybody,
Sorry if I jump in and ask something already answerd, is there any replacement I can do for 1N5309 I have looked all over local shop I get nothing. I just thing about LED or something for replace 1N5309 any suggestion ?
regards.
Hi everybody,
Sorry if I jump in and ask something already answerd, is there any replacement I can do for 1N5309 I have looked all over local shop I get nothing. I just thing about LED or something for replace 1N5309 any suggestion ?
regards.
Hi,
I have looked at adding a two transistor CCS to the PCB but it's going to look messy, even piggy back fashion.
If I add a few components to stiffen the CCS rail supply and clean up any rail modualtion then the one component 1n5309/509 becomes ten components, even messier.
Looks like I will have to order them by the ten and put up with the extra carriage charge. Same goes for the FETs.
I have found a 1.3C/W sink for the drivers that fits beautifully and acts as the PCB mounting as well. It's half of an SK102, 50mm long. One has 8fins (1.28C/W) and the other has 9fins (1.14C/W)
drilled and tapped for two setscrew fixings through the amp base plate. A 66x110mm or 66x100mm hole through the base for an air inlet and the fins form the grille.
I have looked at adding a two transistor CCS to the PCB but it's going to look messy, even piggy back fashion.
If I add a few components to stiffen the CCS rail supply and clean up any rail modualtion then the one component 1n5309/509 becomes ten components, even messier.
Looks like I will have to order them by the ten and put up with the extra carriage charge. Same goes for the FETs.
I have found a 1.3C/W sink for the drivers that fits beautifully and acts as the PCB mounting as well. It's half of an SK102, 50mm long. One has 8fins (1.28C/W) and the other has 9fins (1.14C/W)
drilled and tapped for two setscrew fixings through the amp base plate. A 66x110mm or 66x100mm hole through the base for an air inlet and the fins form the grille.
Hi Mr Jacco
Thanks for the link,
could somebody tell me what the relation between how many mA in current source in this krell with the current in output stage ?
in short what will happend if the current source higher than 3mA like in use 1N5309.
what FET I must use ? if I want tou use FET for replace 1N5309
Thanks for the link,
could somebody tell me what the relation between how many mA in current source in this krell with the current in output stage ?
in short what will happend if the current source higher than 3mA like in use 1N5309.
what FET I must use ? if I want tou use FET for replace 1N5309
I'll take 'em...
Just a pair of boards please.
my email is stuarteasson at yahoo.com, let me know the email address for paypal and I'll send the cash.
Stuart
Just a pair of boards please.
my email is stuarteasson at yahoo.com, let me know the email address for paypal and I'll send the cash.
Stuart
if the CCS current is increased in the LTP (BJT) first stage it increases the amplification of that stage and can cause the amplfier to oscillate due to excessive feedback lowering the phase margin.
Does the same apply to the LTP (FET) second stage?