N power JFet testing
for THF51-S , body is drain ( no need for isolation for test , just keep heatsink electrically from other voltage potentials , other than + rail), fat protruding pin is source,while thin protruding pin is gate
again , any power N channel JFet , having ebough cojones , and having gate voltage in range of -1 to -3V6 is adequate for SissySIT circuit
if you sort your P channel mosfets , and use those with highish gate voltage (for -19 to -25V and Iq 1A8 to 2A) , in area of -4V5 , JFet can have even -4V gate voltage for intended conditions
have more questions , shoot
for THF51-S , body is drain ( no need for isolation for test , just keep heatsink electrically from other voltage potentials , other than + rail), fat protruding pin is source,while thin protruding pin is gate
again , any power N channel JFet , having ebough cojones , and having gate voltage in range of -1 to -3V6 is adequate for SissySIT circuit
if you sort your P channel mosfets , and use those with highish gate voltage (for -19 to -25V and Iq 1A8 to 2A) , in area of -4V5 , JFet can have even -4V gate voltage for intended conditions
have more questions , shoot
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Check...(and waits for slow boat from Asia while wondering what “sonnested” means...perhaps it’s from ZM dictionary like trampolinea?)
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Google knew what you meant even if a gringo like myself didn’t...thanks for the diagram...will tuck it away for when the big bugs arrive
They are NOS with no replacements on the horizon. I bought some from
Tomoaki, and he is a reliable supplier.
look what Santa ....
bummer is that I got just 25pcs of ACS (Hall) chips
ookup at Digikey side
will have 75 more in bloody 3 weeks from now .....
anyway , pcbs in no less than 7 days , so train is slowly , but surely rolling
🙂
so , besides plenty of tiny parts , these are most important newcomers ... 1K of 2SK2145BL and 250 of Elna Silmisc II 22u/25V 🙂
bummer is that I got just 25pcs of ACS (Hall) chips
ookup at Digikey side
will have 75 more in bloody 3 weeks from now .....
anyway , pcbs in no less than 7 days , so train is slowly , but surely rolling
🙂
so , besides plenty of tiny parts , these are most important newcomers ... 1K of 2SK2145BL and 250 of Elna Silmisc II 22u/25V 🙂
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Oh we are spoiled aren’t we?...thanks JPS that is the perfect solution to my paranoid OCD in my head saying “is this right?...am I doing it right?”
tnx JPS
that's easily done even with exacto knife and metal ruler
edit- batery switch is big no-no ........... better to pull battery out when not using entire shebang , than forgetting to engage switch to on , while having THF energized
that's easily done even with exacto knife and metal ruler
edit- batery switch is big no-no ........... better to pull battery out when not using entire shebang , than forgetting to engage switch to on , while having THF energized
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Xformers for SissySIT
#60 , Babelfish M25 , AKA M2 on steroids , AKA M2-XA25 bstrd
for Edcor , you have Don Audio locally
didn't checked for Jensen
for Cinemags , found some in Europe (probably also Don Audio) but no type needed in stock
contact Cinemag directly , it'll be around 50+30$, for pair at your doors
#60 , Babelfish M25 , AKA M2 on steroids , AKA M2-XA25 bstrd
for Edcor , you have Don Audio locally
didn't checked for Jensen
for Cinemags , found some in Europe (probably also Don Audio) but no type needed in stock
contact Cinemag directly , it'll be around 50+30$, for pair at your doors
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Should I request any certain specs, or are they good to go whatever ships? Much thanks for the response.
Russellc
well , Moi not exactly being Pa ......... but I wrote few times that I believe any THF51-S you get , will be happy in SissySIT circ
oh yes , clasical repeater , 4 times 150 Ohms
it'll fit like a glove
hoverer , doesn't matter how high Lundahl is rated , don't be so sure that Lundahl could be any better sound-wise than , say, Cinemag
I didn't tried , but from previous experience , sometimes ancient iron was superior to Lundahls (same type , same circuit) .......
so - who knows why is that good ...... that you sold them
🙂
it'll fit like a glove
hoverer , doesn't matter how high Lundahl is rated , don't be so sure that Lundahl could be any better sound-wise than , say, Cinemag
I didn't tried , but from previous experience , sometimes ancient iron was superior to Lundahls (same type , same circuit) .......
so - who knows why is that good ...... that you sold them
🙂
This project really sucked me in, Tokins are on the way, i'll measure them and if i'm lucky they'll drop right in.
Just how hot do these things run, could i get by with a 3U Dissipante chassis from Hifi-2000 you reckon?
Just how hot do these things run, could i get by with a 3U Dissipante chassis from Hifi-2000 you reckon?
even if you decide to open the window (Sweden one , in a middle of winter) , while your cojones go freeze off , 3HE is not going to cut it
at least not in summer time
be a man ! go for 5U/400
at least not in summer time
be a man ! go for 5U/400
I have a bunch of raw HeatsinkUSA units that are 12”X7”X1”. Their description on the site says:
Quality extruded aluminum heatsink
Alloy: 6063-T6
Width is 12.000"
Fin Height is 1"
Base Height is .300"
Weight is approximately .60 lbs per inch
C/W/3": approximately .85
Think they’ll cut it with this project?
Quality extruded aluminum heatsink
Alloy: 6063-T6
Width is 12.000"
Fin Height is 1"
Base Height is .300"
Weight is approximately .60 lbs per inch
C/W/3": approximately .85
Think they’ll cut it with this project?