T368 comes home!

[Steve - WB3HUZ]

Cool. Todd and I will have a table there, so if you want to sell something, bring it. We'll do the lunch thing after.

[N3DRB The Derb]

ho-k.    getting ready to invade the ghetto. band should be coming back into shape about now - I'm working on JN's 75A-2's.

[WA1GFZ]

I think it is ok to be smug if run a T3. The only unsmug thing about it is they only run on 120 volts.

[ke7trp]

Not smug at all.. Its 700 lbs..  and the same peak power as the globe king   I just wanted it because my elmer restored it and my friend ran it until he lost his battle with cancer.  Thats not smug

C

[Steve - WB3HUZ]

LOL. Since some posters like to use dictionary.com or whatever, consider looking up troll. You guys are too easy.

All kidding aside, since you are new Clark, you wouldn't know this. But about 10-15 years ago there were tons of T-368s suddenly showing up on the bands, and the QSOs were as bad the Flex QSOs are now.

[N2DTS]

Oh, I thought being mil spec it would be over rated enough for the bigger tubes.

Not much signal increase between say 300 and 500 watts...

I still have some t368 parts from when fair radio used to sell them....
What is the mod trans spec's, I might have one of those also.

Brett

Its about 350 watts of audio.  I can plug in 4-250s but the Fil trans runs hot. I should change it.  I am not going any farther with this rig. I got it for sentimental reasons.  I will use it once in a while. The dual 304TL by dual 4-400s will be my HIFI machine.

Clark

[ke7trp]

Its a cool old Transmitter.. I got it going Hi Fi now.  Enjoying it tonight. 

Brett, Let me know what you have.  I have since been in contact with alot of T3 owners. 

I am looking for the big allen bolts for the Drawers, I am missing 3 of them and my friends is missing 4. 

Clark

[N2DTS]

I have the pto/multiplier section, always thought about using it as a vfo exciter, had some rf deck tune and load parts, maybe the mod iron (20,300 ohms to 9100 ohms), made by freed, solder sealed.
I may have other parts I got at fair radio 30 years ago, but don't know if they were from a t368.


I also have a bc610 power transformer and mod transformer.

The 610 power trans is really big and heavy for its power....

Brett

[ke7trp]

Those are good parts Brett. 

I got great reports on the T3 tonight with the audio rack into it.  I think I am about done with it. I would like to find the Allen bolts for it. Then, it will go into the final resting spot and sit on 160.  I will take some better pictures of the thing soon. 

I would love to modify it, but I think this one needs to stay the way it is.  I am going to finish my Dream TX soon and that will be my main Rig. 

Thanks to ALL that have helped me with this thing.. I needed ALOT of help to get it going and everyong pitched in. I love this forum!

Clark

[N3DRB The Derb]

Brett,

keep me in mind if you ever want to depart with the parts. 

[N2DTS]

Got a t368?
I have no use for the mod transformer, the pto part I might use someday....
Not sure where the final tune stuff is, gears and so on...

Brett

Brett,

keep me in mind if you ever want to depart with the parts. 

[WA1GFZ]

If you think a BC610 transformer is nice , try two across a 240 volt line.

[N2DTS]

Derb,
I have the front plate that tunes the final, with turns counters and gears, and that mod transformer which I am not sure is from a T368 or not.

I will hold on the the pto, but have the multiplier sub chassis part, I don't know what I did with the rest of the exciter deck.

Anyone know what the mod trans spec's were for the T368?

Brett

 

Got a t368?
I have no use for the mod transformer, the pto part I might use someday....
Not sure where the final tune stuff is, gears and so on...

Brett

Brett,

keep me in mind if you ever want to depart with the parts. 

[ke7trp]

I was looking at mine the other day.. Its someting like 9K and 21K 250 Watt max.  Mine has the clipper bypassed and the Speach filters bypassed. This got me about 200 to 16K.  I cant get more low end. To much capacity in the tank

C

[n2bc]

Has the PA tank been reworked?   In its stock form B+ is fed at the junction of the PI and L coils.  Moving the plate block C, and reducing it to a more reasonable value, and feeding B+ traditionally will help reduce the C in the PA tank.  I'm pretty sure the mod is on here somewhere.

[ke7trp]

Thats a Timtron mod.  I am not that handy to get do that myself. I dont want to hack this rig up. Its a very nice restored Rig.  I just did minimal mods to it.   I am sure it would help. But most of the people cant here be below 200 anyways.

C

[N3DRB The Derb]

doesnt excess tank C effect the highs instead of the lows??

[ke7trp]

Not according to Timtron. He told me that to get the lows. The Tank has to be changed.  I dont know enough about it to tell you.

C

Brett. I think I need that Mod trans.. Mine is not acting right. Hold on to it while I test mine please.

C

[N2DTS]

The trans is 9100 to 20,300 ohms, 250 watts, 300 to 3500 Hz 1db.
A poor mod iron for hifi!

Not sure what it does at the -3db points.

I never heard of the RF tank components limiting the low end, I have a hard time buying that even if timtron said it.
I would not expect the mod trans to go down to 40 Hz, but it might do 150 Hz at -3 db, who knows.

I forget what I paid for it at fair radio 30 years ago.
Free if its picked up, $50.00 for shipping.
I usually get burnt on shipping, I just sent a receiver out and it was $60.00 to ship it one state away!

Brett

[N2DTS]

I DON'T think its nice, its way to big and heavy for the power it puts out.
All that cast iron end bell stuff just adds weight, the CVM5 was like that 'lets just bolt on another 50 pounds'...

The RCA iron i have has all the weight in the core, with very little extra in the brackets and so on.

I have a nice 1.75 KVA RCA that is about the same weight, maybe a little less, with twice the core of the bc610 one.

PIX below.
Anyone have any use for the thordarson trans in front?
Cryptic tag, T6735,  .54kva, volts primary 4m,  type output, 4000, 5700, 8000.

Brett

If you think a BC610 transformer is nice , try two across a 240 volt line.

[Fred k2dx]

Look up the mod section T368 articles. the iron is better than that 300-3500 rating. Also look on W1UJRs website for much T368 info in one place.

I never swept mine but it sure doesn't sound that restricted. The clipper and filters were bypassed and a line level input added to the speech amplifier by the previous owner.

I received the rear panel multipin connector from William Perry Co. They are very prompt. They also still don't take credit cards and bill you! It's good to see trust these days!  

 

[Steve - WB3HUZ]

Either you misheard or Tron mispoke. There is excess shunt capacitance in the final output section. This kills the highs.

Read Tron's mods here.

http://www.amwindow.org/tech/htm/t368.htm

Not according to Timtron. He told me that to get the lows. The Tank has to be changed.  I dont know enough about it to tell you.

C

Brett. I think I need that Mod trans.. Mine is not acting right. Hold on to it while I test mine please.

C

[ke7trp]

Yeah.. I read that wrong.  I dont have a problem in the high end.  Mine goes to 16K.  Sure it slopes off but that is fine. Its more then flat from 200 to 12K where I need it. 

Something is wrong.  I hooked up the scope. It wont close the carrier.   YEC in San Diego is going to send me some Used 4-125s to try. Maybe I have one that is toast. I hope its that simple.

C

[WBear2GCR]

I have a post in the FS section, fwiw...

              _-_-bear

[flintstone mop]

Oh brother, another smug T-368 owner.

these troublemakers!

The T-3 was my first A.M.TX. Steve was the instigator there. (1990 Fair Radio $700 and received on a shipping pallet) After the Timtron mods it was close to Bcast quality with the stock iron, stock tubes. It will do a fair amount of Pos peaks with the 4-125's no need to "upgrade" to 4-400's as modulators.
It's happier with a tune/loading for 250 watts out. NO ONE will ever notice that you're not legal limit or whatever.

The blower is another story. I replaced the bearings in mine and it wasn't any quieter.
I think Warren had his blower keyed to be off while receiving and on for TX. Are there two fans in the T-3? The blower (noise) for cabinet air and a separate one for the final?

FRED