maggie roundie
 

hey all just alittle digging, i have the maggie roundie combo , huge but anyway further back i think i had asked about this set and the video output section. this set had a replaced crt and emissions are fine but i cant seem to get the picture brighter then it should and i know something is wrong. the video output tube was infact bad and i replaced it but made no difference. also resistors around that tube i checked and are fine. so now i dont know where to look at this point on what may be preventing the brightness from being brighter then it should. my 63 silvertone has the original crt and is brighter then the maggie. so at this point maybe a resistor went high in value i dont know but maybe someone here can give me a hint on where to look. the set works great and the colors are fine and i can leave it the way it is but i just think something is not what it should be.

Could it be the AGC setting??

no that agc dont make a difference at all. i wish it were that easy because its a job to get the chassis out for any problem with the tuner and stereo all wired together.

Have you possibly subbed the first and second video tubes? Did your Maggie use a 6AW8?

i have to get the back off to make certain but i think there was 6aw8 and i do believe i didnt sub any tubes i put what was listed as the correct ones to be in there.

I don't have the maggie schematic diagram and don't know how it works. If you want post the schematic, I could see well about the components and the possibilities of this trouble.

well i dont have the schematic as well but im sure its something simple im overlooking.

If you post the Maggie's model and chassis number' s; I might have the schematic, if you need it. Pictures would be nice someday when you have time!

ok i will so as soon as i get this thing away from the wall ill look at the model numbers. its a big truck as most of these combos are,lol,lol.

My Magnavox had a bad horizontal blanker tube making the picture dark. Mine is a good deal later but it is worth the try.

A gassy 6AW8 can make the video look especially weak and dull. I've seen many of them test good on the checker, and then perform poorly in the circuit... more in RCA chassis, personally... I dont have an example of a Maggie set right now, but am actively looking for one.

there a ceramic resister near the service switch that can give you lack of brightness.looks like a bad crt.seen this quite a bit on those old magnavox chassis

Check the boost rectifier. Should be about 300 volts more than boost on the cathode end.

Don

hi , how are you don, yes i have been this route befor with bad boost diodes so i will check that for sure. thanks

well i dont think the crt is bad it tests very good and its from 1982. picture is clear colors perfect just not bright the way it should be and the contrast seems to be affected by the lack of brightness.

i meant the effect is like a bad crt,not that you have a bad crt.i remember those magnavoxs having a lack of contrast and brightness caused by a ceramic resistor near the service switch.saw a couple of crts replaced because of this issue.good luck

well i will tell you this maggie had the crt replaced in i think it was 1982 but it was because something fell behind it like a big mirror people would hang above an old set and it hit the protective cover in the back and broke the neck. ill keep that resistor in mind, thanks

Be sure to check the caps around the video output tube. Seems there was a coupling cap that could cause this problem.

i did notice that i had replaced the videooutput tube thinking that was the problem but i had put a new one in when i got the set and from the start the brightness was not what it should be so months later with very little hours using it i decided to change that tube i tested it and it was completly dead. i had put another in but didnt help the brightness at all and i have not checked the second one i put in to see if that one went bad. could there be a problem somewhere that will damage the video tube to show just about zero on the tester. all the tubes were checked prior to putting them in or maybe that tube was not good in some way.