Tech-Master NIB TV Kit #5516

[Electronic M]

The hourglasing may also be from a large line transformer too near to the CRT...If you got one near the set move it away a few feet if you can.

[Crist Rigott]

Originally Posted by Electronic M

The hourglasing may also be from a large line transformer too near to the CRT...If you got one near the set move it away a few feet if you can.

No line transformer near the CRT.

[Crist Rigott]

Tomorrow I should have my HV probe for my VTVM. Only then will I know what kind of HV I have.

[dieseljeep]

Originally Posted by Crist Rigott

Tomorrow I should have my HV probe for my VTVM. Only then will I know what kind of HV I have.

I have the same model Knight-Kit VTVM, bought and built in 1962. I never had the HV probe.
The meter still works great.

[Crist Rigott]

Originally Posted by dieseljeep

I have the same model Knight-Kit VTVM, bought and built in 1962. I never had the HV probe.
The meter still works great.

Cool! The probe is the Knight-Kit probe for the KG-625.

[dieseljeep]

Originally Posted by Crist Rigott

Cool! The probe is the Knight-Kit probe for the KG-625.

By the time, I needed a HV probe, I ended up buying a Pomona HV probe. It was the most common at the time. I mainly used it for color sets.

[Crist Rigott]

OK everybody.

I got my HV probe today and assembled it and hooked it up to my KG-625 VTVM. After a few minutes warm up time for both the TV and VTVM, I zeroed the VTVM and measured the HV at the door knob connection of the HV lead going to the CRT. 12Kv. I then measured at the CRT, 12Kv again. So I'm getting 12 KV at the CRT with the "stock" assembly.

[dieseljeep]

Originally Posted by dieseljeep

I have the same model Knight-Kit VTVM, bought and built in 1962. I never had the HV probe.
The meter still works great.

I did change the original probes with an Eico Uniprobe, much more convenient.
About 20 years ago, I replaced the "C" battery and rechecked the calibration.

[Crist Rigott]

I found the focus problem...most likely.

I pulled the base off the bulb and the focus wire was broken.



Unfortunately, I broke a filament wire in the process.