Why so low voltage? You can scare up a 250-0-250 to 340 ish, c-l-c smooth it a little and then regulate to just under 300 or so
i just found some high voltage regulator board on Ali - will post a sch (hope it is allowed)....
description says input voltage can be around 260VAC ( i have 250)... if center tap is used (250-0-250) then D3 and D4 should be removed.
Also theny claim output voltage goes from 100-300VDC which is o.k.-ish too..... also multpile choices for the tube (or SS) in series...
Might go for that one..... pcb is professionaly made, looks good imho... i have some russian 6P3S-EV tubes i could use there...
description says input voltage can be around 260VAC ( i have 250)... if center tap is used (250-0-250) then D3 and D4 should be removed.
Also theny claim output voltage goes from 100-300VDC which is o.k.-ish too..... also multpile choices for the tube (or SS) in series...
Might go for that one..... pcb is professionaly made, looks good imho... i have some russian 6P3S-EV tubes i could use there...
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Hard to vouch for. Ask Tea-Bag if he has an SSHV-kit for sale. It will give you optimum results but not the coolest. 0C3 is the coolest
Tube hv-regs generally works but are hard to make speedy enough for audio. Many have tried, I don't see that many success stories. Interesting subject in its own right though.
I was just checking.... i have 2*7Vac/3A, 1*6.3Vac/2A and 1*5Vac/2A...... i can't use the one above because i want also to have a tube rectifier (5V/2A is a little bit low on current)...
Maybe to go with Maida or SSHV afterall.....
Maybe to go with Maida or SSHV afterall.....
I understand.... but wanted to seoarate the tubes heatings... each secondary, one tube..... need to recheck that
o.k. - been searching around a little bit...
1.option - use 7V/3A for one 6V6, second 7V/3A for the other 6V6... rectifier tube EZ4 on 6.3V/2A, C-L-C and SSHV2 after that
2. option - use both 6V6 on one 7V/3A coil together, second 7V/3A for the rectifier tube like GZ34, C-L-C and SSHV2 after that.....
Personally i am not a fan of GZ34 but nice EZ4 is not that easy to find anymore......
any better suggestions instead of GZ34 with heater 5V or 6.3V and 2A max on heater....? 5Z4 ?? any russian ?
1.option - use 7V/3A for one 6V6, second 7V/3A for the other 6V6... rectifier tube EZ4 on 6.3V/2A, C-L-C and SSHV2 after that
2. option - use both 6V6 on one 7V/3A coil together, second 7V/3A for the rectifier tube like GZ34, C-L-C and SSHV2 after that.....
Personally i am not a fan of GZ34 but nice EZ4 is not that easy to find anymore......
any better suggestions instead of GZ34 with heater 5V or 6.3V and 2A max on heater....? 5Z4 ?? any russian ?
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Each tube in a 6V6 pre with over 300V B+ biases at about 15-20mA.
so i have cca 15-20mA per 6V6 (that wil total for 30-40mA), SSHV about 20mA - my main secondary 250-0-250 is 150mA - i am good there.....
will see what i will do with heating of 6v6 - maybe i will end up using a CCS with lm317 afterall and tune it to every tube i change for those 6V6's - that way voltage drop will be smaller i think...
also from what i can see LT1084 might also be good (one per tube) - i think i can squeeze it into that 7V/3A secondary - will have to think.... if 7VAC i will get about 9.8VDC without a load... let's say 9VDC with load... that leaves 2.7VDC for the regulator - might work....
will see what i will do with heating of 6v6 - maybe i will end up using a CCS with lm317 afterall and tune it to every tube i change for those 6V6's - that way voltage drop will be smaller i think...
also from what i can see LT1084 might also be good (one per tube) - i think i can squeeze it into that 7V/3A secondary - will have to think.... if 7VAC i will get about 9.8VDC without a load... let's say 9VDC with load... that leaves 2.7VDC for the regulator - might work....
Easiest way is 6.3V classic voltage source mode reg for heaters and capacitance multiplier filter with Zener(s) voltage ref for B+. Easier on heatsinking. Cathode follower version does not amplify what little ripple is left on the rail and still plays good with less effort in power supplies.
I already got pcb for SSHV2 - mannaged to find one in Poland..... 🙂 🙂