Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Late Model 60 sensitivity/bandwith when tuning
#9

I used a signal generator this morning and peaked the IF's at 460kc. My generator is accurate and i have a frequency counter to check. The Riders instructions are not clear. It just mentions the IF compensator locations and the high and low frequency compensators. No other instructions, so I put the signal through the antenna and ground connection as I have read and have done for most other alignments that have detailed instructions.

After peaking, there was still a good bit of oscillation as I tuned across the dial. The stations come in strong, but it still has what I would call a wide bandwidth, hearing the desired frequency about 30kc before and after the desired frequency. The signal/sound is very good when you get right to the station frequency, it is just that you can still hear it on either side more than I am used to on other radios I have aligned.

I then decided to detune the IF's just a bit and it helped a lot (acted like a regen set). The oscillation lowered quite a bit. Now I am only getting an oscillation at the lowest frequencies, 570 and 660. If I tune carefully, there is no oscillation on the station, it is only if I am slightly on either side of the station frequency.

All other stations above the low frequency ones work well and it is a big more selective as well now. I did change all resistors already and caps. I used it a few hours today and it played well except for the above.

Maybe this is normal for this set? Maybe i am too picky?


Messages In This Thread



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM
Preliminary work on wife's Silvertone 2014
Hello roy, that great news glad it worked out for you !! Sincerely Richardradiorich — 10:50 PM
Preliminary work on wife's Silvertone 2014
Safety caps arrived today.  Soldered one in and had a successful first power-up.  No magic smoke escaped and it tunes in...glyphmon — 09:53 PM

[-]
Who's Online
There are currently no members online.

>