A470 Outputs [wiring question]

Can output trannies be partially new? or newer?
I am looking at my ST70 guts and noticed some leads are cloth covered and some are plastic? Leads to speaker outputs are plastic [yellow,orange,brown, black] and red leads to cap is plastic, the other leads to tubes are cloth.
The bells are in excellent condition tempting me to conclude "new or newer" outputs

Hi,
PVC leads indicate a newer production version. I have seen this mix of
of cloth & PVC leads on other Dynaco transformers. At one point PVC
totally replaced cloth covered leads in consumer products. Perhaps the
transformer provider at the time "Tresco" from Philadelphia was in the
process of changing over to PVC and had a remaining inventory of the
cloth lead stock which they used on the transfomers.
Dynaco's last supply of transformers came from Japan...I have several
samples of these which I removed the end bells for close inspection.

IMHO these were poorly made and typical of what one would expect from
the Chinese today. If I get a chance...I will post a few photos.

Another indicator of a newer production transformer is the labeling of
the covers. Early versions were metal stamped "Embossed" whereas the
later production labeling was an a white ink stamping.

Regards,

Kevin

Thnx very much for that clarification.

"IMHO these were poorly made and typical of what one would expect from the Chinese today. If I get a chance...I will post a few photos."

Curious just how bad are they? LOL I am rebuilding it and wondering if I should go all the way with it $wise?

Mine are "stamped" btw.

thnx

Hi,
Purchased a small mixed lot of Dynaco NOS transformers a while back
sight unseen...Older gent from Chicago area who did not have internet
capability or a camera. Trusted his description & sent him off the $$.

A mixed group of MK III transformers, a few PA-135's, C-354 cokes and
(4) A-470's. All the power transformers were dual voltage 120/240 which
was a rare find. All were unused but in need of re-painting since they
were not propery packaged by the seller.

The (4) A-470's had the PVC leads...no cloth lead mix like yours.
Attempted to remove the covers from one of these units for painting
but they would not budge after removing the hardware. Finally pried
off one cover which pulled the output leads completely out of the
windings. The inside of the covers was totally encapsulated with a
hardened shelac like resin. The remaining A-470's were the same.

Since this transformer was already damaged..I cut open the windings
at the face of the laminations which revealed the various layering of
each of the windings. At the core you could see pieces of wood used as
a filler to form the core at the center of the winding. The voids were
also filled with this resin like material. Workmanship was surprisingly
bad...

These were not made here in the USA..And I strongly suspect these were
made in Japan.

I hope you do not have a pair these transformers..Try removing the covers
carefully...If the come off easily then you are home free. If not...
I would buy a small boat in need of an anchor. LOL.

Regards,

Kevin

Hi Kevin, I decided I couldn't wait till tomoro to find out ...LOL
Turns out mine are fine - bells dropped off after screws were pulled. Inside was light wax/shellac? and paper protecting the windings. Needless to say I was relieved as I would rather buy more Dynaco's than a small boat...