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#736
10-22-2022, 08:04 PM
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Quote:
 $.70 each is worth it!
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=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために 
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#739
10-23-2022, 06:39 AM
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#740
10-23-2022, 08:26 AM
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Pin 3 v1 64 volts add antenna 74 volts and if I up the gain the voltage drops highest voltage is with the gain at min I think this subber clock wise is low gain. I think I’m going to focus on v1 because voltage does go up on both v1 and v2 with antenna on so it is working but not enough. There are a few resistors a 22 ohm that measures 25 ohms don’t seem to high and the 18k measures 17.40k I’ll have to double check the 2.2k.
Last edited by timmy; 10-23-2022 at 08:51 AM.
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#741
10-23-2022, 09:07 AM
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Good Morning!
I think you should try setting a goal of fixing this tv before this thread hits 60 pages! Anyway.... Since you have that tuner subber, and it puts out TV type IF signal, I think you should take the signal that comes out of it, and make a nice little poker probe, with a coupling cap of course, and poke it around in the IF section and see if you can narrow down where it works and where you loose it.... You did that video injection at Test Point 'B' a few pages back, so why not take that IF signal from the tuner subber and poke it into each of the 3 IF stages and see what you get...? Don't forget to ground the ground part of the output cable, then just turn the center wire into a capacitor coupled probe.... Aim for the G1's of each stage, put up some screen shots 1. no signal anywhere, 2. 1St, IF right at G1 3. 2Nd IF right at G1 4. 3Ed IF right at G1. Naturally the signal will not be strong enough to produce a picture as you get closer to 3ed IF, but the signal is what those circuits are tuned to respond to, so I think it's your best bet to see at what point you might be loosing your juice at... Oh, and congratulations, your tuner subber is now also an IF section analyst you can rename it later...... ..
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Yes you can call me "Squirrel boy" Last edited by Username1; 10-23-2022 at 09:11 AM.
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#742
10-23-2022, 09:36 AM
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I have the chassis on the bench and I’m going by voltages and pin 2 of v1 I get same result nothing further up other then pin 2 I get the same with the subber plugged in. I have to check the 2.2k resistor again.
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#743
10-23-2022, 12:04 PM
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Does it appear that the k1 agc network would have anything to do with the IF functioning because I put together k1 and the only thing left that the IF would be lacking is the .4 source from the tuner because I have the chassis on the bench. Can’t find anything else obvious here.
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#744
10-23-2022, 12:27 PM
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http://suzaku.live-evil.org/0417191838b(1).jpg OR pay way too much for a tube test socket like this https://www.ebay.com/itm/36352391049...N2AYQ&LH_BIN=1
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#747
10-23-2022, 02:33 PM
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Well, I never had those fancy tube sockets.... I use to take 30 Gage wire & wrap it
around each tube pin I wanted to measure something on, then plug the tube back in and I had access to whatever I needed on that tube.... But it would be best if you had a nice little bench you could put the chassis on, flipped like that and make all your measurements.... Just build one, it's not like it's going to add significantly to the time it's taking to get this tv working anyway..... And with all you spent on caps, precision resistors, tubes, diodes, & thermisters, flyback transformers, you cudda just took out all that stuff and put a flat screen in it already..... So just build a nice chassis table, put some movable arms on it, mount a few lights, do it up nice! Oh, and don't forget add one or two cupholders..... .
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Yes you can call me "Squirrel boy"
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#749
10-23-2022, 03:01 PM
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The resistors I got I didn’t use the 2.7k because I got 2.7k 3watt but the voltage says they are rated for 135v so I’m not sure if it’s good to use them being there is 275v at one end. But I checked the 2.7k ones left in there and they show good however the others did not.
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#750
10-23-2022, 04:28 PM
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Problem here is I only put 2 resistors in v1 after not seeing a positive result got discouraged so after making a new k1 with the new 680k I put the chassis back in and was surprised to see an image and words I can read didn’t have that befor so now I put the other 2 resistors in v2 and I’ll try it tomorrow I still didn’t change the 2.7k in both because I screwed up when I got the resistors the 2.7k 3watt are only rated for 135v not sure if I should use them I don’t want to use them to have to pull the chassis again because they couldn’t handle the voltage and went high or opened.
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