What gain figures are you aiming for?
I would like to try different preamps in the future to drive my cripled F4 and this might be a nice project!
I would like to try different preamps in the future to drive my cripled F4 and this might be a nice project!
read linked blog post and what's written here
say that 6db is sweet spot to max 12db of gain , achieved with autoformer are realistic to shoot at , everything above is stretching the concept - nonpractical and more steps back than forward
think of output impedance , square ratio of voltage ratio .......
say that 6db is sweet spot to max 12db of gain , achieved with autoformer are realistic to shoot at , everything above is stretching the concept - nonpractical and more steps back than forward
think of output impedance , square ratio of voltage ratio .......
I'll re read it one more time.
The whole output impedance and ratios is way over my head. 😕
if voltage gain is 2 (6db) then output impedance is buffer's Rout x 4 (2^2)
so , if gain is 2.81 (9db) , Rout is buffer's Rout x 7.94 (2.81^2)
so , if gain is 2.81 (9db) , Rout is buffer's Rout x 7.94 (2.81^2)
Better suited to power amps with gain I see. I re read the article again and understand now the whole concept a bit better I think.
Might be a nice preamp for the sony Vfet amp!
Might be a nice preamp for the sony Vfet amp!
Mezmerize would be a great board to use - it will run the circuit and you could utilize the switching as well...
b) it really depends of several factors , but good xformer when properly fed and properly loaded , is hard to beat in signal energy preservation department.
however , there are electronic solution for that (se to bal) task , but I can vouch only for solutions where two output phases are intrinsically connected , contrary to often used OP based circuits , where existing phase is just flipped with OP and voila ...... you have both legs , but for me they're as from different persons
nothing wrong with Frankenstein , but he's not audio signal
Appreciate your insight as always. Below is slightly off topic from the iron pre but transformer related so please bear with me.
Presently trying out my just completed BA3 balanced pre connected to my SE F5TV3 monos. Using just the + phase and shorting the- to grnd thru a 47.5K resistor as suggested by you. Thinking of connecting the balanced output of each channel to a Jensen JT11P1 to convert from balanced to SE to connect to the monos. (Planning on converting the F5TV3 to balanced eventually) This would also allow me to eliminate the output coupling caps in the pre (differential offset when hot is under 10mv). What do you think? Any sonic advantage or waste of money?
Thanks. nash
did I suggest shorting negative output to gnd ?
I simply cannot remember that ......
whatever - try bal to se conversion through xformer and let your ears decide .....
also - prior to trying xformer , let your ears decide is it better grounding negative output , or leaving it unloaded
I simply cannot remember that ......
whatever - try bal to se conversion through xformer and let your ears decide .....
also - prior to trying xformer , let your ears decide is it better grounding negative output , or leaving it unloaded
You actually answered a question for me in either the M2 or the F6 thread about one of these single ended amps taking a balanced cable connection. I suggested the shorting of neg to ground, as that is how the Aleph J board is treated for single ended input.
You answered that not all balanced sources would respond well to shorting the neg, and that 47K ohm across the neg to ground would better simulate a balanced output to a balanced source.
Hi Zen,
beautiful idea, so nice I might copy it.
I have no clue about transfomers, so my question:
would a Monacor LTR-110 work (->datasheet)?
I may also use it to do some stepped attenuation...
Thx
beautiful idea, so nice I might copy it.
I have no clue about transfomers, so my question:
would a Monacor LTR-110 work (->datasheet)?
I may also use it to do some stepped attenuation...
Thx
same what happens when you try to mount yourself , your better half , mother in law and father in law ........ on same scooter , at once
when that demands at least 6 scooters , situated in at least two different countries
yes , but I'm expecting that they're at least twice better than Monacor ones
so - check shipping and customs (in case of obtaining them directly from Edcor) , and you'll know what to do
so - check shipping and customs (in case of obtaining them directly from Edcor) , and you'll know what to do
mhmm, could one just use the F6 Jensen Transformer, connect it "somehow" (sorry , that part needs a bit of meditation for me) for some "step up" gain? or is it just a 1:1 ratio transformer.
stefan
stefan
