|
|
|
#16
12-08-2019, 10:03 PM
|
|||
|
|||
|
I finished the IF strip today. My HV caps should be in tomorrow so I can finish up the chassis without waiting on any orders.
 
|
|
#17
12-08-2019, 10:14 PM
|
|||
|
|||
|
Oh, BTW, I have changed out 45 resistors so far. Only 9 have been in tolerance. 80% out-of tolerance, 20% in-tolerance.
|
|
#18
12-09-2019, 02:04 PM
|
||||
|
||||
|
I had the same experience with the resistors in the 2 sets that I have done. Worst by far of any set I have restored. One way that Pilot got to their $99.00 price point was by using the cheapest (worst quality) resistors their purchasing department could locate. They had a rough finish on them, so unlike the Allen-Bradley smooth finish.
__________________
Tim
|
|
#19
12-12-2019, 10:52 PM
|
|||
|
|||
|
Almost done. Need some .047 630V caps and to reinstall the tuner and change the 2 caps in the HV cage.
|
|
#20
12-14-2019, 10:09 PM
|
|||
|
|||
|
OK Today I turned it on and I have a problem I'm hoping we can get it solved.
As you can see in the picture, it looks like severe vertical fold over. The Vertical height works and as shown is maxed out, and all the other controls work properly. While I wait for suggestions, I'm going over the Vertical circuit to see if I messed up a component or put it in the wrong place. I'm using a 3RP1 right now. The CRT that came with the TV looks to be gassy and doesn't display a raster. Thanks guys. 
|
| Audiokarma |
|
#21
12-15-2019, 12:08 AM
|
|||
|
|||
|
Found the problem. I inserted a 4.7K instead of a 4.7M resistor. R96 in the Sams. On to alignment.
 
|
|
#24
12-16-2019, 08:19 PM
|
||||
|
||||
|
Watching this and decided to do the TVS diode mod. Got some and installed it as I read the post between the filaments of the 25Z6. Pins 2 and 7. Easy install. It flat lined the vertical output. No joy. Removing it brought the sweep back with no damage. What did I do wrong?
__________________
“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.
|
|
#25
12-16-2019, 09:10 PM
|
||||
|
||||
|
Sounds as if you limited the 25 volt heater of the 25Z6 to a little over 6 volts (or whatever the diode is designed for) likely killing B+ to the vertical circuit.
The diode needs to be installed accross the heater pins of the crt, not the rectifier. Pins 1,11 of v21, not pins 2,7 of v20. jr Last edited by jr_tech; 12-16-2019 at 09:14 PM.
|
| Audiokarma |
|
#26
12-16-2019, 09:12 PM
|
|||
|
|||
|
I posted a mistake and deleted it.
|
|
#27
12-16-2019, 09:19 PM
|
||||
|
||||
|
Jr. Makes sense. I used the other post instructions for the 25Z6 and will give the CRT version a try. Now back to our regularly scheduled post.
__________________
“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.
|
|
#28
12-17-2019, 01:51 PM
|
|||
|
|||
|
I'm going to add a retrace line blanking circuit to my TV-37. I see elsewhere of adding a 220K resistor inline with the CRT grid wire and then adding a 820pf 1KV cap at the resistor/CRT junction to pin #5 (plate) of the V. output tube. Connected to pin 5 of that tube is a .005 6Kv cap. Do I install the 820pf cap on the side of pin 5 of that 6kv cap?
|
|
#30
12-18-2019, 05:50 AM
|
||||
|
||||
|
what crt pin are you putting the 220 k, then attaching a 820pf cap to the resistor then to pin 5 of the vert output tube, I ask because I have a pilot without the blanking circuit and I may do the same.
|
| Audiokarma |
 |
|
|
Linear Mode
