1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

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

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Linear Mode
Model 60 6A7 oscilator distortion
koosh01
New Member
*
Posts: 2
Threads: 1
Joined: Aug 2018
City: Arlington Heights State, Province, Country: IL
#4

11-29-2018, 06:13 PM
Hi Terry,

The oscillator coil checked out ok. However, I found out that moving and separating the wires connecting the 6A7 to the oscillator coil, antenna coil, and band switch from each other as much as possible, I was able to eliminate almost all of the distortion and reduce the across-band attenuation considerably. Now the oscillator waveform is pretty clean and the amplitude only drops about 3 dB from 550 KHz to 1600 KHz. I guess there was some stray cross-coupling that was causing the distortion. The factory wiring layout of the stock Model 60 leaves something to be desired. The radio works great now. Thanks.
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
Model 60 6A7 oscilator distortion - by koosh01 - 11-28-2018, 03:53 PM
RE: Model 60 6A7 oscilator distortion - by koosh01 - 11-29-2018, 06:13 PM
RE: Model 60 6A7 oscilator distortion - by AI2V - 12-29-2018, 04:55 PM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
462ron
Hi Mike, that 84 sure looks great. You don’t often see these antique radios with a fuse like yours has. I usually instal...462ron — 10:22 AM
Atwater-Kent 84, restoration.
Hello Mike, Wow ! far as my AK it does work and the cabinet is in nice shape so is my chassis anyway here is a photo of...radiorich — 02:59 AM
Atwater-Kent 84, restoration.
Nice radio, Mike! Here's hoping it was well rebuilt. Take care and BE HEALTHY! GaryGarySP — 12:12 AM
Atwater-Kent 84, restoration.
Rich yes, this is the way I got it. I have just put it on the table and took it apart. I suspect it even might work,...morzh — 11:31 PM
Atwater-Kent 84, restoration.
Hello mike, What nice looking radio I have one AK in my collection it's a console I have not started restoring it yet ....radiorich — 11:21 PM
91H Code 126 Restore
Just to make it more confusing here is another model 91 schematic that doesn't show parts with dotted lines in that spot...Arran — 10:37 PM
Atwater-Kent 84, restoration.
The wires were desoldered from the can, and the capacitors checked. All checked at 0.102 uF, which is correct. So the c...morzh — 09:41 PM
An attempt to remove the Field Coil from a G speaker
Arran Yours probably then the H speaker, same as mine.morzh — 08:39 PM
An attempt to remove the Field Coil from a G speaker
Mike; I would like to have a look at the speaker in my model 96, but the set is packed into a corner in the basement. ...Arran — 08:04 PM
91H Code 126 Restore
Thanks Arran, I'm convinced the power cord is good but have a nice repro plug for it. Would it be prudent to add a fus...RealRider — 07:28 PM

[-]
Who's Online
There are currently 4858 online users. [Complete List]
» 2 Member(s) | 4856 Guest(s)
AvatarAvatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration