I used 6VAC tx for the AZ1 heaters and between the 6VAC hot to AZ1 1R in series to lowered to 4VAC, I measured to check and I have 4,9VAC instead 4VAC, I changed to 2R and now I have 4VAC at the AZ1 heaters the issue is fixed.
You know something weird, I had it in mind to ask what is going on with heaters next. Good. I wanna see picture of 80 yrs old AZ1 mesh plate glow over SSHV2.
If its the one with single mosfet and 3 leds CCS start with 68R. That one is SSHV(1). SSHV2 has a trimmer, 2 mosfets, a test point, and no leds in ccs.
Yep, parallel the chokes. But maybe you don't wanna spare all your valuable chokes since the reg is gonna cut much ripple too. Maybe just c-l-c one cell is enough.
Thank you Salas, I was talking about SSHV (1). So will start with a c-l-c configuration with two parallelled choke for a 60 mA current max and 68 R ccs value. Is also possible to reduce current ccs consumption to a value below 20 mA? Thinkin' about tu use two SSHV1 in a single HV rail and stand below 30 mA max.
You will see the mine soon 😉
Anto
Thank you Salas, I was talking about SSHV (1). So will start with a c-l-c configuration with two parallelled choke for a 60 mA current max and 68 R ccs value. Is also possible to reduce current ccs consumption to a value below 20 mA? Thinkin' about tu use two SSHV1 in a single HV rail and stand below 30 mA max.
You will see the mine soon 😉
Anto
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Ciao,
Looks really good, Valvo are considered by many the best AZ1 mesh plate ever made so please pic of Valvo.
Cheers
Felipe
Looks really good, Valvo are considered by many the best AZ1 mesh plate ever made so please pic of Valvo.
Cheers
Felipe
Attachments
Ciao Anto,
Phisicallly speaken seems more similar the Valvo to the Siemens than the Miniwat.
Grazie e ciao
Felipe
Phisicallly speaken seems more similar the Valvo to the Siemens than the Miniwat.
Grazie e ciao
Felipe
Felipe,
in the same 220 V sec tx- graez- c-l-c- line the valvo shows 304 volt and the minivatt 280 volt " a vide"
Anto 😉
in the same 220 V sec tx- graez- c-l-c- line the valvo shows 304 volt and the minivatt 280 volt " a vide"
Anto 😉
enjoying the low capacitance benefits of a mesh plate here? 😉
BTW that one pictured is a perforated plate, mesh is built from loose wires.
Salas,
I felt the urge to update my three year old PCBs for SSHVSR-version1 with kelvin connections. The plan is to run 30cm (twisted +/-) wires to the load. Now I hesitated to put the zobel at the load or across Q3. Any changes when employing IRFP9140 instead?
BTW that one pictured is a perforated plate, mesh is built from loose wires.
Salas,
I felt the urge to update my three year old PCBs for SSHVSR-version1 with kelvin connections. The plan is to run 30cm (twisted +/-) wires to the load. Now I hesitated to put the zobel at the load or across Q3. Any changes when employing IRFP9140 instead?
An externally hosted image should be here but it was not working when we last tested it.
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Across Q3 is its best place, and star gnd at its capacitor. No changes for IRFP140, and you can use IRF9620 for cheaper TO-220.
Another idea 🙂
When splitting the power part from the drive part, the driver would be exposed to less heat. Can the connection to R7 be streched to 30cm?
Alright, not - as it would destroy the kelvin connection effect.
When splitting the power part from the drive part, the driver would be exposed to less heat. Can the connection to R7 be streched to 30cm?
An externally hosted image should be here but it was not working when we last tested it.
Alright, not - as it would destroy the kelvin connection effect.
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