Thread Rating:
  • 2 Vote(s) - 4.5 Average
  • 1
  • 2
  • 3
  • 4
  • 5

TrueTone Model D-2026 series B Manual
#47

Received a pair of 1.2K 50 watt and 1K 50 watt chassis mount resistors in the mail yesterday. The 1k resistors placed my center tapped outputs slightly above the 250 vac reference. The 1.2 k pair placed me slightly under the 250 vac reference, 248 vac. Installed 1.2k pair with a bit of thermal grease to help dissipate heat. Now when radio plugged into wall outlet, it displays proper radio operation instead of center tapped secondary overdriving everything and causing radio to be inop. After playing on AM for a half hour temperature of 1.2k resistors approximately  107 F. Even was rewarded with two somewhat weak FM stations. So... looks like I am on solid ground as far as progress. Can pick up over 40 AM stations most are weak, which far surpasses any other radio I've worked on yet. Thinking I'll start by just touching up Osc and antenna tuning on the tuning gang and see if that strengthens the output. 

Need to put out a call for a little help on finding the alignment directions for this Truetone D-2226A chassis. The schematic was kindly supplied to me and has gotten me where I am now. But have been unable to find a detailed alignment procedure. Think I have AM tuning figured out. FM not so much.

Have boosted my knowledge of tube type radios a fair amount with this radio. Also learned the bulb filament on my dim bulb tester can provide false readings when checking operational voltages during troubleshooting. Comes a time after all the caps have been changed to just plug it into a wall outlet and see what happens. Voltmeter probes in hand to quickly take power supply voltages.


Messages In This Thread
TrueTone Model D-2026 series B Manual - by TTech - 10-04-2020, 12:34 PM
RE: TrueTone Model D-2026 series B Manual - by TTech - 12-12-2020, 08:22 AM



Users browsing this thread: 8 Guest(s)
[-]
Recent Posts
IF can wire size and Rubber mounts?
Thanks to both members for your help regarding wire and tuner mtg supports. regards--Johngeorgetownjohn — 09:33 AM
Hickok AC51 tube tester
Note that no power cord, power switch, or power transformer switch are shown. That (along with my experience with full s...DaleHCook — 07:09 AM
IF can wire size and Rubber mounts?
A pair of wire strippers can give you an idea of what the existing gauge of the wire leads are in the IF can, I think it...Arran — 06:07 AM
My last cabinet for this year
Hello Dan, That is really beautiful what great looking radio you have ! I have friends who live in Calgary and the wea...radiorich — 01:51 AM
Philco Predicta Siesta picture over time getting dimmer
I found that the wire insulation was burnt.  The fly back needs corona dope! Why would someone put that there?Platinumblonde36 — 01:09 AM
Philco Predicta Siesta picture over time getting dimmer
This is what it looked like beforePlatinumblonde36 — 01:01 AM
Philco Predicta Siesta picture over time getting dimmer
Platinumblonde36 — 12:58 AM
Philco Predicta Siesta picture over time getting dimmer
Platinumblonde36 — 12:57 AM
Philco Predicta Siesta picture over time getting dimmer
I'm finding some strange things in my set and for the most part it's also original, so I need to start going over everyt...Platinumblonde36 — 12:55 AM
12' Philco
Not anymore Mike. Andre The Giant Born: May 19, 1946, Coulommiers, France Died: Jan 28, 1993 (46 years), Paris, Fran...RodB — 11:53 PM

[-]
Who's Online
There are currently 3459 online users. [Complete List]
» 1 Member(s) | 3458 Guest(s)
Avatar

>