I am looking for a decent FM signal/sweep generator as I want to start aligning tuners. The Ebay prices are ridiculously high for units that are "untested", "powers on only", and without test leads. There is a Sencore SG-165 for $560. This is just insane. Are there any recommendations on where to look?
FM Signal/Sweep Generator Availability
- Thread starter 71R/T
- Start date
amptramp
Well-Known Member
I got my SG-165 at a London Vintage Radio Club meeting (in London Ontario, not the UK). It was $10 but someone had butchered the output meter wiring for one channel and three transistors were dead, primarily because they are 12 volt transistors being run off a 12 volt regulator and the slightest spike killed them. Working on an SG-165 is like building a ship in a bottle but it can be done if you follow some of the guides in various places on the net. Craigslist and Kijiji are good sales sites in Canada but I don't know if you have Kijiji in NC.
Even though I got it running for under $10 in parts, be aware that R365, the 390 ohm source resistor for the output buffer is hopelessly underrated at a quarter watt and should be 2 watts. This all shows up in some posts (mostly by me) in:
http://www.antiqueradios.com/forums/index.php
You can find them through Google.
Even though I got it running for under $10 in parts, be aware that R365, the 390 ohm source resistor for the output buffer is hopelessly underrated at a quarter watt and should be 2 watts. This all shows up in some posts (mostly by me) in:
http://www.antiqueradios.com/forums/index.php
You can find them through Google.
To properly align a FM stereo tuner you need at least a FM SG with int/ext stereo modulation and a THD/fft analyzer.
Best to say what types of FM tuners/models you plan on aligning as that may help determine the quality of equipment you need?
FYI, I use a HP 8656B,11715A, 3325A, 8904A, Amber 3501
Good luck in your search. Think/look at what one of these cost new in the day. I bought all of the above on where else
Best to say what types of FM tuners/models you plan on aligning as that may help determine the quality of equipment you need?
FYI, I use a HP 8656B,11715A, 3325A, 8904A, Amber 3501
Good luck in your search. Think/look at what one of these cost new in the day. I bought all of the above on where else
KentTeffeteller
Gimpus Stereophilus!
If it is HiFi, medium to high end, the FM signal generator needed to align it, needs to be higher end than what can align ordinary tuners and receivers. Also, calibrated within the last 5-10 years is a plus.
