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

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

Zenith 7s488 assistance request
#1

   

Hi Guys,
I’m in need of some help with a Zenith 7s488. I’ve recapped the radio and have the audio section working. I’m getting some bad voltage readings from some of the tubes. These voltages were recorded at 80 volts on a variac.

6K7G (RF)- P 205 v., G2 0 v., G3 0 v., G1 0 v.
6A8G (Converter) - P 0 v., G2 235 v.
6K7G (IF) - P 213 v., G2 0 v., G3 0 v.
6J5G (Det) - G 0 v.

I didn’t include readings from the 6X5G, 6F5G and 6F6G because they are apparently functioning. Transformers and coils show continuity so I assume they are good. This is a tough radio to work on because everything is packed tightly. Any direction from the Phorum Pfolks is appreciated. Thanks. - Rob Q.


Messages In This Thread
Zenith 7s488 assistance request - by Rob Quay - 07-24-2022, 09:14 PM
RE: Zenith 7s488 assistance request - by morzh - 07-25-2022, 08:40 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 07-26-2022, 07:52 AM
RE: Zenith 7s488 assistance request - by Rob Quay - 07-26-2022, 02:36 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 07-26-2022, 04:32 PM
RE: Zenith 7s488 assistance request - by MrFixr55 - 07-26-2022, 07:49 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 07-26-2022, 08:47 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 07-27-2022, 02:03 PM
RE: Zenith 7s488 assistance request - by morzh - 07-27-2022, 08:33 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 07-27-2022, 11:46 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 07-28-2022, 08:51 PM
RE: Zenith 7s488 assistance request - by MrFixr55 - 07-29-2022, 04:59 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 07-31-2022, 08:42 AM
RE: Zenith 7s488 assistance request - by morzh - 07-31-2022, 11:08 AM
RE: Zenith 7s488 assistance request - by Rob Quay - 07-31-2022, 09:53 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 08-03-2022, 09:27 AM
RE: Zenith 7s488 assistance request - by Rob Quay - 08-11-2022, 09:21 AM
RE: Zenith 7s488 assistance request - by MrFixr55 - 08-16-2022, 11:42 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 08-17-2022, 09:33 AM
RE: Zenith 7s488 assistance request - by MrFixr55 - 08-17-2022, 09:14 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 08-18-2022, 09:12 AM
RE: Zenith 7s488 assistance request - by Rob Quay - 08-20-2022, 10:10 AM
RE: Zenith 7s488 assistance request - by MrFixr55 - 08-21-2022, 10:04 AM
RE: Zenith 7s488 assistance request - by Rob Quay - 08-21-2022, 11:14 AM
RE: Zenith 7s488 assistance request - by MrFixr55 - 08-21-2022, 05:55 PM
RE: Zenith 7s488 assistance request - by Rob Quay - 08-21-2022, 09:29 PM



Users browsing this thread: 5 Guest(s)
[-]
Recent Posts
The list of my radio & TV collection!
Hello Peter, Thank you for posting that !! Sincerely Richardradiorich — 09:40 AM
Eico 232 VTVM Schematic
It's a microwave antenna. ?;-p?. I substituted 1N4002s off the 6.3 vac winding for the 1.5 volt battery. Uniprobe is the...RodB — 05:50 PM
Eico 232 VTVM Schematic
Try BAMA for a schematic. Looks like a replacement power source for the D battery has been installed. The tube may be...Chas — 04:51 PM
Eico 232 VTVM Schematic
Is that a battery holder?morzh — 04:43 PM
Eico 232 VTVM Schematic
A friend gave me this Eico 232 VTVM and I'm having trouble locating the schematic for it. This one seems to be a later v...RodB — 04:17 PM
Var resistor id
Considering what it is in series with, I doubt there should be any power requirements. Of course, we should know wher...morzh — 03:23 PM
Var resistor id
Trim pot, about 1/2 watt part of focus divider. As stated 2k ohms. This appears to be a rusty chassis, resolder all ...Chas — 03:19 PM
Var resistor id
Its a Sylvania 400 oscilloscope. here is a clip of r-100. Would be nice to know the current required. Not listed in part...Martinj — 02:10 PM
The list of my radio & TV collection!
Thanks Richard. I hope you enjoy it. Here I have created an English section on the history of radio with videos in Engl...RadioSvit — 10:23 AM
The list of my radio & TV collection!
Hello RadioSvit, first all happy new year ! I will watch your new videos this week. Sincerely Richardradiorich — 09:19 AM

[-]
Who's Online
There are currently 9547 online users. [Complete List]
» 2 Member(s) | 9545 Guest(s)
AvatarAvatar

>