#151
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The demods and color difference amps are very much like RCA too, except for using the 6MK8 dual pentode instead of separate X and Z demod sections.
Would have to do a detailed analysis to see if they had different color difference gains and angles than RCA. |
#152
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Well people were blasting the "crappy Chroma demoduator" used in the "magget box" When I posted about this on FB vintage TV forum, with stuff like ," I hated the Magnavox tube sets! Chroma demoduator was crap, could not get good flesh tones."
I cant really say, but i DO like the CTC-16XL better, and this is the only and first set i have seen using a 6MK8.
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#153
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Quote:
If on it gives gives a brown cast to the color.You have to also watch the plate resistors to the demods. Motorolas & Sylvanias too ! Bottom line is turn off the auto color switches, AFT is the only one to use IMHO. To be fair Zenith did something similar. Early " Custom" series sets ( 9-181 main board ) that replaced the S3 ( 9-160) had a puky orange pix. Then better sets came out & had a great pix. A few minutes in the manuals gave the reason. Better sets had auto color, cheap sets did not ! Turning off the auto color gave the good pix, turning it on gave the orange pix. So from that point on we modified every one without auto color we sold & the pix was as good as any. Told the Boston service rep about it & he told me "this conversation never happened" and DONT tell Chicago ! enuf fer now Zeno LFOD ! |
#154
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Do you mean the cheap sets had no switch but had autocolor permanently on?
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#155
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IIRC it used a Hitachi IC & the same era Hitachis had a displeasing color palette also. IIRC the original IC was a 221-### later was a 221-###-01 and the color problem went away. Zeno |
Audiokarma |
#156
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So far, knock on semi-fake wood, the Maggie has been behaving after the tube wiggle, I try it about twice a week, and so far, the loss of color sync has not come back, weird!
Dare I put the back cove on it and tempt fate! :O
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