Hey Dudes Pixies or Pixels or what not
A) tanks for Drowings and such
B) 2SK389 and 2SJ109 where one mere mortal can get those?
Sems that LSK170 is the only decent component in production and still waiting for P chanels.
PS Chester UK in the midle or there about (not other side of Penines to cold there and road to get to is full of poth holes)
Not Jester my sense of humor does not grant me nor justify that priviledge.
PSS Is the obficialy certified and much loved Court Jester back from hollidays ?
A) tanks for Drowings and such
B) 2SK389 and 2SJ109 where one mere mortal can get those?
Sems that LSK170 is the only decent component in production and still waiting for P chanels.
PS Chester UK in the midle or there about (not other side of Penines to cold there and road to get to is full of poth holes)
Not Jester my sense of humor does not grant me nor justify that priviledge.
PSS Is the obficialy certified and much loved Court Jester back from hollidays ?
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Decent suasages I can get plenty of choice and different armonic balance and dinamics.
Scrounging Jfets is much harder there is load of stuff that having started so late is realy difficoult loads of good stuff no longher in production in the past 2 years.
LS part soon is the best possible news.
Tanks for your imput
Al
Scrounging Jfets is much harder there is load of stuff that having started so late is realy difficoult loads of good stuff no longher in production in the past 2 years.
LS part soon is the best possible news.
Tanks for your imput
Al
This has been corrected in the updated BOM. It should be up to replace the old one the soonest possible.
So sorry for the confusion.
I don't understand why new BA-3 driver/gain amp and BA-2 power amp module can't use individual seperate supply, unlike the F5
I thought the driver/gain amp was more like a seperate preamp
and that you could use any other preamp, like say a tube pre
and the BA-2 is more like a power buffer, with its own bias curcuit
so, I ask again, any reason not to use individual seperate power supply ?
only connection really needed is common signal, yes?
I thought the driver/gain amp was more like a seperate preamp
and that you could use any other preamp, like say a tube pre
and the BA-2 is more like a power buffer, with its own bias curcuit
so, I ask again, any reason not to use individual seperate power supply ?
only connection really needed is common signal, yes?
It can. You could also have the FE in a seperate case with a connections that allow it to both pass a signal to and recieve power from the main output stage along with its PSU. I have strongly considered this simply because it allows for multiple FE choices without having PSU's for each one.
You should take a long look at THAT Corporation. They have an ex-military fab that allows semi-discrete topology within their chips. It's practically the equivalent of discrete transistors. They also have extensive balanced performance that exceeds transformer performance.anyone know of a good balanced digital/chip controller/attennuator ?
Probably the most interesting for your specific question might be:
THAT 5171 High-Performance Digital Preamplifier Controller IC
THAT 1510,1512 Low-Noise, High Performance Audio Preamplifier IC
THAT 1570 Low-Noise, Differential Audio Preamplifier IC
More basic building blocks:
THAT 1200,1203,1206 "InGenius" High-CMRR Balanced Input Line Receiver ICs
THAT 1240,1243,1246 Balanced Line Receiver ICs
THAT 1280,1283,1286 Dual Balanced Line Receiver ICs
THAT 1250,1253,1256 Low Cost, Balanced Line Receiver ICs
THAT 1290,1293,1296 Low Cost Dual Balanced Line Receiver ICs
THAT 1606,1646 "OutSmarts" Balanced Line Driver ICs
... and, now that I've mentioned their near-discrete capabilities, some folks may be interested in the following, particularly when matched transistors are needed:
THAT100 Quad Low-Noise NPN Transistor Array
THAT120 Quad Low-Noise PNP Transistor Array
THAT140 Quad Low-Noise NPN/PNP Transistor Array
THAT 300 Series Low-Noise Matched Transistor Array ICs
I wouldn't try to claim that their ICs are appropriate for every design, but they represent a very unique option that folks should consider.
Thanks for the link. I have that data sheet in my collection, but I'm not actually looking for an integrated amp.
My goal in mentioning THAT was to answer the question posed by tinitus. He may have been joking, but he may have been serious. I saw a design based around the THAT 5171 chip at an AES meeting, and it really seemed like something that people might find interesting. If you want the kind of control that this offers as opposed to manual potentiometers and stepped attenuators, then it might be for you.
Personally, I want to build one of Papa's balanced input amplifiers, but I plan on driving it from my DAC, which has +26 dBa output levels. I assume that I won't even need a preamp at all if I already have +26 dBa capabilities. I can attenuate digitally and not lose too much resolution.
hmm, I understand connection of balanced BA3, its simple enough
but when someone asked, why not connect to ground, Nelson said, 'do you not want to be able to drive single ended also
implies that source could be either balanced, or optional single ended
would be nice if someone would explain this further
but when someone asked, why not connect to ground, Nelson said, 'do you not want to be able to drive single ended also
implies that source could be either balanced, or optional single ended
would be nice if someone would explain this further