Hello All
I'm trying to repair my Wavetek-SSI 3000 radio service monitor for ham-radio use. I bought it used and dead back in 2001 and am now taking a big stab at getting it up and running.
The original transformer was gone when I got it but through a lot of research, I was able to identify and contact Northlake Engineering who made the original transformer back in the early 80's and get the specifications for the transformer. They haven't made this one in years and it would cost over $1000 just to make one for me. It is a 115V primary with six individual secondaries of 6.3 (Filament), 7.7 (5Vdc), 14.9 (-15Vdc), 15 (+15Vdc), 200 (CRT 200Vdc), and 1200 (CRT 1200Vdc?). It is a very small transformer for what it contains. The 6.3, 200, and 1200 are all for running the internal 3" crt oscilloscope.
The 1200vac at 0.5milliamp secondary voltage is proving near impossible to replicate in my research so far. Hammond makes a 1250Vac tranny, but it's well over $100 alone and is way too big to fit in the chassis along with five other trannies for the other voltages that I need.
A friend recommended a neon-sign tranny but I'm not familiar with them and I can't find any on the web close in voltage.
The 1200vac secondary goes to the high-voltage power supply board where it is immediately rectified through a bridge rectifier and conditioned for use by the CRT.
I'm an electronics tech at a TV station and work with some nice colleagues, but they are all theoretical guys and I need help in the "re-engineering" realm
I have attached a schematic of the circuitry if that helps.
Thanks in advance,
Dan G.
I'm trying to repair my Wavetek-SSI 3000 radio service monitor for ham-radio use. I bought it used and dead back in 2001 and am now taking a big stab at getting it up and running.
The original transformer was gone when I got it but through a lot of research, I was able to identify and contact Northlake Engineering who made the original transformer back in the early 80's and get the specifications for the transformer. They haven't made this one in years and it would cost over $1000 just to make one for me. It is a 115V primary with six individual secondaries of 6.3 (Filament), 7.7 (5Vdc), 14.9 (-15Vdc), 15 (+15Vdc), 200 (CRT 200Vdc), and 1200 (CRT 1200Vdc?). It is a very small transformer for what it contains. The 6.3, 200, and 1200 are all for running the internal 3" crt oscilloscope.
The 1200vac at 0.5milliamp secondary voltage is proving near impossible to replicate in my research so far. Hammond makes a 1250Vac tranny, but it's well over $100 alone and is way too big to fit in the chassis along with five other trannies for the other voltages that I need.
A friend recommended a neon-sign tranny but I'm not familiar with them and I can't find any on the web close in voltage.
The 1200vac secondary goes to the high-voltage power supply board where it is immediately rectified through a bridge rectifier and conditioned for use by the CRT.
I'm an electronics tech at a TV station and work with some nice colleagues, but they are all theoretical guys and I need help in the "re-engineering" realm
I have attached a schematic of the circuitry if that helps.
Thanks in advance,
Dan G.
Attachments
-
59.9 KB Views: 15
-
97.2 KB Views: 14