Hi guys,
Does anyone recognize this device?
Regulated voltage stabilizer with E130L pass device(ef83,ecc283 plus some OA2..)
Unfortunately,there is no labeled anywhere.But looks like professional,with some germans inscriptions.
I appreciate schematic,tech. manual or any info.
Many thanks,
Does anyone recognize this device?
Regulated voltage stabilizer with E130L pass device(ef83,ecc283 plus some OA2..)
Unfortunately,there is no labeled anywhere.But looks like professional,with some germans inscriptions.
I appreciate schematic,tech. manual or any info.
Many thanks,
Attachments
Most tube regulated supplies follow the same principes
The schematic is going to be relatively straightforward, E130L in tetrode operation with an extra winding on the mains transformer to provide a “floating” G2 supply, that is perhaps even regulated by a 0A2. E283CC error amplifier followed by a E83F? VAS( voltage amplifier stage)
If my reasoning is correct you should have at least 3 neon regulator tubes in there, one in the cathode of the E83F and two in series from yet another winding providing “stacked” -150 and -300V
The neon in series with the cathode of the E83F is likely because of the need to shift the voltage level from one of the anodes of the E283CC to a lower voltage on the grid of the E83F
The schematic is going to be relatively straightforward, E130L in tetrode operation with an extra winding on the mains transformer to provide a “floating” G2 supply, that is perhaps even regulated by a 0A2. E283CC error amplifier followed by a E83F? VAS( voltage amplifier stage)
If my reasoning is correct you should have at least 3 neon regulator tubes in there, one in the cathode of the E83F and two in series from yet another winding providing “stacked” -150 and -300V
The neon in series with the cathode of the E83F is likely because of the need to shift the voltage level from one of the anodes of the E283CC to a lower voltage on the grid of the E83F
My command of German is anything but outstanding, but I'll have a go at some of the inscriptions.
Ausgangespannung = Output Voltage
Ruckstellung = Reset
Aus = Out and Ein = In
Nulipunkt = Null (Zero) Point
Eichen has me confused. FWIW, I think of Eichenlaub which means oak leaves. Eich is the German word for oak.
The inscription that reads Nür ... drücken is warning that the pushbutton should be pressed only when something is installed in either the zero point or 1 V. jacks.
The unit seems like a nice enough bench supply for working with tubed small signal circuitry.
Ausgangespannung = Output Voltage
Ruckstellung = Reset
Aus = Out and Ein = In
Nulipunkt = Null (Zero) Point
Eichen has me confused. FWIW, I think of Eichenlaub which means oak leaves. Eich is the German word for oak.
The inscription that reads Nür ... drücken is warning that the pushbutton should be pressed only when something is installed in either the zero point or 1 V. jacks.
The unit seems like a nice enough bench supply for working with tubed small signal circuitry.
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The separately supplied screen mode was not often used since the screen might expire if the main B+ fails. That said I did build a couple like that in the lab where I worked circa 1960. An included or separately powered 2-stage diff amp was usually sufficient to get the gain required to drive a triode, even the 6AS7G/6080 at mu = 2. Did many like that & others using multiple 807s or KT88s as the passer(s). Think HKs reg supply used 6L6s in the screen mode but not sure, gotta look.😀