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

The second 800B tuner has arrived..
#1

Just today. Odd, since this is the part that was oversize and came via Parcel Select. The amp chassis arrived in Seoul this afternoon, so I should get that tomorrow.

Minor damage to the preset mech on the back. One side bent in slightly, should be a simple fix.

This one's been totally recapped. They didn't restuff the cans, just disconnected them and installed the new caps. Not a bad job, really. But they missed something: the plate resistor for the RF amp was measuring about 1.3 megohm rather than the 15K called for. Replacing that gave me great gain on AM/BC, but there's a disconnect somewhere between the detector/AVC and the eye tube, as there is no indication whatsoever despite the tube appearing to be almost new. I will put another tube in there and see if there is any difference, just to be sure.

SW is dead. No LO at all. When I switch from BC to SW, the plate voltage drops from ~129 to around 103, but I don't think that would kill it completely. Have to try to figure that one out. Feeding a signal in from my sig gen does result in good reception on the band, so if I can get that LO going, it should do very well. If anyone has experience with this particular problem please feel free to toss in your two cents.

FM seems pretty good on this one. Much better gain than on the other tuner, there's even some white noise between stations as there should be. Still not quite what it should be, though, as it will only partially close the eye tube on a very high signal, it barely moves at all with an average input. I kind of suspect perhaps weak IF tube or tubes. I have some on order, so we'll see on that.

All buttons work properly on this one. Once I get that preset mech bent back into shape, I'll try my hand at setting up some presets. Nice to be able to turn it on and off. Icon_smile


Messages In This Thread
The second 800B tuner has arrived.. - by BrendaAnnD - 11-19-2013, 10:15 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
philcorepairbench.com - shadow-meter
Thanks Ron.fenbach — 02:43 PM
Model 70 Cabinet Trim
Thank you, Gary. Before making my original post, I had clicked on "Steve Davis Cabinets" only to find that it...musar — 02:25 PM
philco predicta
Welcome to the Phorum, cgl18! I am not your resource for television repair, but lots of friendly help is available here...GarySP — 02:12 PM
Model 70 Cabinet Trim
Welcome to the Phorum, musar! You can send Steve Davis a private message (PM). The site is at the top of the Home page...GarySP — 02:09 PM
Model 70 Cabinet Trim
How do I contact him? The only contact information for him I could find when searching online was a telephone number th...musar — 10:38 AM
philco predicta
Hello, good afternoon, I would like to ask what the possible problem could be if I don't have an image on the screen. I ...cgl18 — 10:19 AM
Philco model 38 code 121 not receiving signal.
So one last question before I finish this radio. Regarding the speaker and output transformer. I salvaged the original o...Stormlord5500 — 09:31 AM
462ron
It’s on the bottom of the homepage of our Philcoradio.com homepage! Ron462ron — 07:20 AM
Model 70 Cabinet Trim
Steve might have some trim left. Not sure he is making anything.morzh — 06:12 AM
Model 70 Cabinet Trim
Hello musar, First all welcome to the forum and yes that is true that steve stopped making trim . Sincerely Richar...radiorich — 12:13 AM

[-]
Who's Online
There are currently 476 online users. [Complete List]
» 2 Member(s) | 474 Guest(s)
AvatarAvatar

>