#16
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Looks like you could use an adapter to go from an octal socket to a 7 pin and use a 6X4.
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#17
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Not sure anyone has one but the picture of the set in the SAMs under teletone tv208 in early television is what I have but like I said it's clearly different. I would like to see the right schematic for this set too.
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#18
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Quote:
http://www.earlytelevision.org/pdf/T...Sams-56-22.pdf Perhaps Timmy could trace out the circuit around the 6X5 and 25Z6 and draw a schematic showing how the power supply is wired. Again I ask, does the set actually work or at least do the filaments light up with the 6X5 installed? jr |
#19
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Quote:
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#20
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I was puzzled over the references to the 6X5 being "used as a ballast". Does that mean the diodes are paralleled and used in lieu of a nichrome wire dropper tube?
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Audiokarma |
#21
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Quote:
I would love to see a schematic for the set that Timmy has, but very likely the schematic is close/same as that of the TV-149, which has an 80 ohm dropping resistor in the heater circuit and also a selenium rectifer as well as the 25Z6 and 6X5. jr |
#22
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Well I looked at the tv149 schematic and it's different as it has 2 - 25z6 tubes and mine only one so I can't go by that schematic should I need to.
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#23
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Quote:
Myself , I'd restore it to what I'd call 99.5% original , I'd leave all the tube circuits alone modification wise and use a modern diode (with resistor) in place of the Selenium (which would remain on the chassis but with both of it's wires run to a terminal strip) As you've already noted , this set has no power transformer to roast , so there really is no need to play "hot potato" with the 6X5 here . |
#24
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Quote:
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#25
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Quote:
jr |
Audiokarma |
#26
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Yes you are right it is shown in 2 sections but one tube but this is definitely not the same schematic for the set I have since the 149 is one a piece chassis and mine is a 2 piece chassis. Even the power supply caps are different.
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#27
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Quote:
The Sams for one of those models, shows the electrolytics drawn with the wrong polarity. BTW, what's so bad with the newer issue 6X5's. I'd leave it as-is. |
#28
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I really need the right schematic because there are resistors that don't have colors and I need to know the right value, they are bad.
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#29
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Could you draw out a schematic of how the components in the circuit are connected and post it here? Perhaps we can back-enginner the circuit and figure out what the resistor values should be.
jr |
#30
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SAMs photofact
I'm still looking desperately for what I believe is the right SAMs for a teletone 208 r because the 208 and the 208 tr have a ballast but mine don't. There are 2 SAMs that I know of, 90-11 and 95-6 both are not mine but I don't know the SAMs number for the 208r . Mine has the round plug that connects both chassis together like the tr and the tr also has the round plug. The 208 has the square plug and a ballast, the 208 tr has the round plug and a ballast, the 208 has the round plug and NO ballast. Does anyone have this print ?
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Audiokarma |
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