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

Simple Tube Question?
#1

This question is for a friend and before misleading him I want to make sure I'm correct. This is on a Colonial model 654. AC/DC set.
http://www.nostalgiaair.org/PagesByModel...002860.pdf

On the 1V half wave rectifier the filaments are pins 1 & 4. Filaments shown in the filament chain only on the schematic. My thought is that the top bar on the 1V on the schematic is the plate. But what is the other line going to the first filter cap and the 2K resistor?

I go to the tube data and it appears to be a cathode. But attached to the case of the tube? It's my first time even seeing a 1V rectifier.
http://tdsl.duncanamps.com/show.php?des=1V

Thanks,
Pepperoni

"It's Nice To Be Nice To The Nice"
Major Frank Burns Mash 4077th
#2

The cathode of the 1V is connected to pin 3. The plate (yes, the "top bar" is indeed the plate) connects to pin 2.

I prefer the NJ7P database, specs of the 1V (with drawings) are shown here:
http://www.nj7p.info/Common/Tube/SQL/Tub...hp?Type=1V

--
Ron Ramirez
Ferdinand IN
#3

Thanks Ron! I use the Duncan Amps site and at the bottom of the page (you already know this) there's an "HTML Page" you can click on that takes you right to the nj7p database. And I do like that database better. Gives a bit more info.

Pepperoni

"It's Nice To Be Nice To The Nice"
Major Frank Burns Mash 4077th




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Made mistake & did not label connection
Hi John, I don't have this radio, but I can supply some info: Based on your pic, pins 7,8 and 1 are used together, go...MrFixr55 — 02:02 PM
New Philco Repair Bench
As far as I know, the Repairbench does not work, and has not been working in a while. Chuck (we had that campaign looki...morzh — 01:33 PM
Radio city products 664 schematic request
Need a schematic or manual for the 664. The 663 may be similar.daveone23 — 12:38 PM
New Philco Repair Bench
Thanks Gary.dconant — 12:16 PM
New Philco Repair Bench
I tried accessing the site through our library and got the same response. It's reported to our tech gurus. GaryGarySP — 11:50 AM
New Philco Repair Bench
I am sure this is the archive, and not the Chuck's site.morzh — 09:50 PM
Made mistake & did not label connection
It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires. Why'n't you...morzh — 09:49 PM
Made mistake & did not label connection
I'm not sure why that wire wasn't covered in the video. I'm pretty sure the 6A8 won't work until that pin is grounded. Y...RodB — 09:47 PM
Made mistake & did not label connection
You'll have to forgive me, I am not sure what you mean.  Can you explain what you are really saying.  If anyone does not...georgetownjohn — 08:05 PM
Made mistake & did not label connection
Those are details better left to the ones who know. Maybe you disconnected the wrong end of the wire.RodB — 06:22 PM

[-]
Who's Online
There are currently 3662 online users. [Complete List]
» 5 Member(s) | 3657 Guest(s)
AvatarAvatarAvatarAvatar
Avatar

>