[West]

Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

west

[Peter Wieck]

On Feb 14, 1:40*am, "West" wrote:
Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

Before that question may be answered with any degree of accuracy, you
would have to define the reasons for such a trade.

a) The existing Dynaco transformers are perfectly adequate for the
intended use assuming that the unit is properly maintained, the tubes
are good and the filter and board capacitors are good. A 45 year track
record supports this statement.
b) Very minor modifications to the main power-suppy will change that
"adequate" to "rugged and bullet-proof" for the power-transformer.
This at the cost of derating the amp by about 5 watts or so.
c) Various modifications or outright replacement of the circuit board
will overcome several other perceived deficiencies of these amps - at
a significantly lower cost than new iron. Patrick Turner has a
"complete" rebuild on his website that takes this option pretty much
to its logical conclusion.
d) If one wishes to replace the iron as suggested, it would be far
more useful to simply build a "New" amp around the "New" iron vs. a
simple substitution. In point-of-fact a simple substitution will only
continue many of the same perceived deficiencies only with new iron -
the only direct advantage being with the power transformer - and that
of questionable utility assuming a) and/or b) above.

So, if the question is to replace for the sake of reliability - No.
Any advantage achieved would be marginal at best.

For the sake of better sound - No, or not until any-of-several other
more productive modifications were already completed and tested.

Because one is curious - Perhaps. But that assumes that one has both
the ears to appreciate tiny increments and subtle results, and the
skills to effect the changes. Both are questionable in this case.

As part of a total rebuild - sure. But then it ain't nohow a Dynaco
any more unless one repeats the same inadequacies and limitations. And
if one does not, why call it a Dynaco?

With a complete change-of-iron, really one is left only with the
chassis and the choke in both these cases. Dynaco used the cheapest
bulk parts they could find from sockets to boards to point-to-point
wire to switches and pots. With a massive rebuild such as is
anticipated, all of those items would normally be changed - new wine
in an old skin. That was a questionable option 2000 years ago, and is
questionable today.

This very question, by the way, has been discussed nearly ad-nauseum
in this and various other venues in the past - with the OP's
participation it seems in several cases. So, one does wonder why this
question was posted other than for attention.

Peter Wieck
Wyncote, PA

[Jon Yaeger]

in article YnRsj.579$Cs.403@trnddc04, West at wrote on
2/14/08 1:40 AM:

Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

west



I would never trade Dynaco output iron for Hammond. But I think you should.

Jon

[legg]

On Thu, 14 Feb 2008 06:40:56 GMT, "West" wrote:

Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

When I was working with Williamson Ultralinear circuits that had
burned out Dynaco transformers (tar everywhere), I found the newer
Hammond parts to function perfectly well. For repairing a brand-name
product, though, I'd try to stick to original parts, where practical.

I recovered the Dynaco laminations for use elsewhere.

RL

[Peter Wieck]

On Feb 14, 8:46*am, legg wrote:
On Thu, 14 Feb 2008 06:40:56 GMT, "West" wrote:
Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

When I was working with Williamson Ultralinear circuits that had
burned out Dynaco transformers (tar everywhere), I found the newer
Hammond parts to *function perfectly well. For repairing a brand-name
product, though, I'd try to stick to original parts, where practical.

I recovered the Dynaco laminations for use elsewhere.

RL

Dynaco-branded transformers were never potted. Althought the same/very
similar iron was used by Acrosound and was potted. Are you sure it was
"tar"?

Peter Wieck
Wyncote, PA

[ElectroJunk]

there goes peter again stating facts when he has none.
i know its hard but maybe sometimes peter you should just keep your know it
all mouth shut as not to overload your arse.
mit




"Peter Wieck" wrote in message
...
On Feb 14, 8:46 am, legg wrote:
On Thu, 14 Feb 2008 06:40:56 GMT, "West" wrote:

Dynaco-branded transformers were never potted. Althought the same/very
similar iron was used by Acrosound and was potted. Are you sure it was
"tar"?

Peter Wieck
Wyncote, PA

[Peter Wieck]

On Feb 14, 10:16*am, "ElectroJunk" wrote:
there goes peter again stating facts when he has none.
i know its hard but maybe sometimes peter you should just keep your know it
all mouth shut as not to overload your arse.

Please point to a potted Dynaco transformer - more-so, in the units
under discussion.

Peter Wieck
Wyncote, PA

[Jon Yaeger]

On 2/14/08 11:25 AM, in article
, "Peter
Wieck" wrote:

On Feb 14, 10:16*am, "ElectroJunk" wrote:
there goes peter again stating facts when he has none.
i know its hard but maybe sometimes peter you should just keep your know it
all mouth shut as not to overload your arse.

Please point to a potted Dynaco transformer - more-so, in the units
under discussion.

Peter Wieck
Wyncote, PA


None of the OEM transformers in my Dynaco ST-70 are potted. However, I do
have some Dynaco A-420 transformers which are definitely potted.

Many older trannies used tar and fish paper between the windings and the
bells, but they were not "potted" in the traditional sense.

Jon

[NewsGroups]

Got your panties in a twist ? Again?


"ElectroJunk" wrote in message
...
there goes peter again stating facts when he has none.
i know its hard but maybe sometimes peter you should just keep your know
it
all mouth shut as not to overload your arse.
mit




"Peter Wieck" wrote in message
...
On Feb 14, 8:46 am, legg wrote:
On Thu, 14 Feb 2008 06:40:56 GMT, "West" wrote:

Dynaco-branded transformers were never potted. Althought the same/very
similar iron was used by Acrosound and was potted. Are you sure it was
"tar"?

Peter Wieck
Wyncote, PA

[Sal Brisindi]

West wrote:
Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

west


The Dynaco ST-70 audio transformers are highly regarded but the original
power transformer was not as they were to small for the amp and get
pretty hot after a few hours.

Just my opinion,
Sal

[robert casey]

West wrote:

Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

west


You mean cloth insulation on the leads? If that looks to be in poor
shape, use some heat shrink or change the leads to fix that. The cloth
is not used in the windings themselves.

[West]

Thanks for all the responses. They will help me to make some decisions.
Can we now discuss the merits of the Dynaco MKIII Xfrs? They are
considerably larger, run cooler and I believe, have better specs. Very
little is mentioned about the MKIII. Any comments? Thanks in advance.

west

"West" wrote in message news:YnRsj.579$Cs.403@trnddc04...
Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

west

[Multi-grid]

On Feb 15, 5:41*pm, "West" wrote:
Thanks for all the responses. They will help me to make some decisions.
Can we now discuss the merits of the Dynaco MKIII Xfrs? *They are
considerably larger, run cooler and I believe, have better specs. Very
little is mentioned about the MKIII. Any comments? Thanks in advance.

west



"West" wrote in messagenews:YnRsj.579$Cs.403@trnddc04....
Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

west

- Show quoted text -

The Hammond 1650R is one of its flyers. excellent, and beefy. I'd take
it ahead of any of the Mk.ii/iii outputs. The smaller A470 from the St.
70 and Mk.iv are better than the A430/431 but I'd still take the big
Hammond. It sounds quite good.
cheers,
Douglas

[Jon Yaeger]

in article 7yotj.30$k_4.4@trnddc04, West at wrote on
2/15/08 5:41 PM:

Thanks for all the responses. They will help me to make some decisions.
Can we now discuss the merits of the Dynaco MKIII Xfrs? They are
considerably larger, run cooler and I believe, have better specs. Very
little is mentioned about the MKIII. Any comments? Thanks in advance.

west

"West" wrote in message news:YnRsj.579$Cs.403@trnddc04...
Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

west



Pest,

Using a bare minimum of effort and imagination, go visit:
http://store.triodestore.com/dytr.html

There you will see:

1. Original specs for Dynaco Transformers!
http://www.triodeel.com/images/dynaxfmr.pdf

2. A comparison test among Hammond, Magnequest, Dynaco & Handwound XFMRs for
the ST35 application. Granted, the ST35 is not the ST70 or MKIII, but you
get the idea! http://triodeel.com/pdf/xfmrshootout.pdf

Do you REALLY want to know even MORE about these XMFRS? Then ask Ned
Carlson of Triode.

Now, there's your answers, but you won't be happy, because once again the
Garage Trader has told you where to go!!!

Jon

[West]

I feel sorry for you. Don't you realize what a fool your making out of
yourself? Are you not too old to "sound down" someone? You're only
displaying immaturity and ignorance. Grow up dude!

"Jon Yaeger" wrote in message
...
in article 7yotj.30$k_4.4@trnddc04, West at wrote on
2/15/08 5:41 PM:

Thanks for all the responses. They will help me to make some decisions.
Can we now discuss the merits of the Dynaco MKIII Xfrs? They are
considerably larger, run cooler and I believe, have better specs. Very
little is mentioned about the MKIII. Any comments? Thanks in advance.

west

"West" wrote in message
news:YnRsj.579$Cs.403@trnddc04...
Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

west



Pest,

Using a bare minimum of effort and imagination, go visit:
http://store.triodestore.com/dytr.html

There you will see:

1. Original specs for Dynaco Transformers!
http://www.triodeel.com/images/dynaxfmr.pdf

2. A comparison test among Hammond, Magnequest, Dynaco & Handwound XFMRs
for
the ST35 application. Granted, the ST35 is not the ST70 or MKIII, but you
get the idea! http://triodeel.com/pdf/xfmrshootout.pdf

Do you REALLY want to know even MORE about these XMFRS? Then ask Ned
Carlson of Triode.

Now, there's your answers, but you won't be happy, because once again the
Garage Trader has told you where to go!!!

Jon

[Peter Wieck]

On Feb 18, 7:58*pm, "West" wrote:
I feel sorry for you. Don't you realize what a fool your making out of
yourself? Are you not too old to "sound down" someone? You're only
displaying immaturity and ignorance. Grow up dude!

Pillock:

We are waiting with 'bated breath your 'breadboard' results. Since
none are forthcoming, complete with schematic and pictures! Otherwise
it is to be assumed that your question with reference to "Sudden B+"
was another troll for attention. Inasmuch as you have asked the
question several times before, for RATs to even hope that something
might actually come of it is rather futile... please prove me wrong!

Given that Jon (and others) have given you sound, apt and on-point
advice on this thread, perhaps you should accept some of it. Yes, you
may have resistance in taking advice from those who have actually
"done" things with tubes - but after all, that is the point of all
this, isn't it? Don't feel compelled to shoot the messenger because he
happens not to like the recipient of the message. That would strongly
suggest that you are ignorant. And you would not want that, would
you?

Peter Wieck
Wyncote, PA

[Jon Yaeger]

I'm a fool because I waste time giving you useful information and you don't
have the wherewithal to grasp it.

In light of your obvious deficiencies, may I recommend some courses to
augment your ignorance? To wit:

1. Google for Idiots. How to make the most out of internet searches.

2. Intro to Buddhism. Will give you really great ideas for your incessant
quest for attention, with questions such as: e.g. "What is the sound of
one hand clapping? "What did your face look like before you were born."
etc.

3. Remedial grammar and composition. For obvious reasons.

4. Morality & ethics. An intro.

5. Epistemology and Logic, aka Philosophy 101

6. And of course, Manners, which I fear is no longer taught anywhere.

ES&D.

Jon















in article FQpuj.10681$k_4.8040@trnddc04, West at wrote on
2/18/08 7:58 PM:

I feel sorry for you. Don't you realize what a fool your making out of
yourself? Are you not too old to "sound down" someone? You're only
displaying immaturity and ignorance. Grow up dude!

"Jon Yaeger" wrote in message
...
in article 7yotj.30$k_4.4@trnddc04, West at wrote on
2/15/08 5:41 PM:

Thanks for all the responses. They will help me to make some decisions.
Can we now discuss the merits of the Dynaco MKIII Xfrs? They are
considerably larger, run cooler and I believe, have better specs. Very
little is mentioned about the MKIII. Any comments? Thanks in advance.

west

"West" wrote in message
news:YnRsj.579$Cs.403@trnddc04...
Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make much
difference?

west



Pest,

Using a bare minimum of effort and imagination, go visit:
http://store.triodestore.com/dytr.html

There you will see:

1. Original specs for Dynaco Transformers!
http://www.triodeel.com/images/dynaxfmr.pdf

2. A comparison test among Hammond, Magnequest, Dynaco & Handwound XFMRs
for
the ST35 application. Granted, the ST35 is not the ST70 or MKIII, but you
get the idea! http://triodeel.com/pdf/xfmrshootout.pdf

Do you REALLY want to know even MORE about these XMFRS? Then ask Ned
Carlson of Triode.

Now, there's your answers, but you won't be happy, because once again the
Garage Trader has told you where to go!!!

Jon

[West]

You really make me chuckle because you think that your so witty. You call me
names and want me to take a course in manners. Oh, again I repeat my
assertion ... everywhere that the Narcissist Wiecked went, Jon Lamb was sure
to go.. Check all the archives, especially the nasty diatribes it's Wiecked
followed by the little lamb, jon.
Remember Jon, the only reason your mad at me is that I exposed your
dishonest practices on ebay. Ouch! that must really hurt. I like attention
and could always count on getting it from my 2 ankle nippers.

Thanks for the laughs,
west

"Jon Yaeger" wrote in message
...
I'm a fool because I waste time giving you useful information and you
don't
have the wherewithal to grasp it.

In light of your obvious deficiencies, may I recommend some courses to
augment your ignorance? To wit:

1. Google for Idiots. How to make the most out of internet searches.

2. Intro to Buddhism. Will give you really great ideas for your
incessant
quest for attention, with questions such as: e.g. "What is the sound of
one hand clapping? "What did your face look like before you were born."
etc.

3. Remedial grammar and composition. For obvious reasons.

4. Morality & ethics. An intro.

5. Epistemology and Logic, aka Philosophy 101

6. And of course, Manners, which I fear is no longer taught anywhere.

ES&D.

Jon















in article FQpuj.10681$k_4.8040@trnddc04, West at wrote
on
2/18/08 7:58 PM:

I feel sorry for you. Don't you realize what a fool your making out of
yourself? Are you not too old to "sound down" someone? You're only
displaying immaturity and ignorance. Grow up dude!

"Jon Yaeger" wrote in message
...
in article 7yotj.30$k_4.4@trnddc04, West at wrote on
2/15/08 5:41 PM:

Thanks for all the responses. They will help me to make some
decisions.
Can we now discuss the merits of the Dynaco MKIII Xfrs? They are
considerably larger, run cooler and I believe, have better specs. Very
little is mentioned about the MKIII. Any comments? Thanks in advance.

west

"West" wrote in message
news:YnRsj.579$Cs.403@trnddc04...
Would you trade old Dynaco (cloth) Xfrs, Power & OPT for both ST-70 &
MKIIIs, for new Hammond ones? Which would you keep or does it make
much
difference?

west



Pest,

Using a bare minimum of effort and imagination, go visit:
http://store.triodestore.com/dytr.html

There you will see:

1. Original specs for Dynaco Transformers!
http://www.triodeel.com/images/dynaxfmr.pdf

2. A comparison test among Hammond, Magnequest, Dynaco & Handwound
XFMRs
for
the ST35 application. Granted, the ST35 is not the ST70 or MKIII, but
you
get the idea! http://triodeel.com/pdf/xfmrshootout.pdf

Do you REALLY want to know even MORE about these XMFRS? Then ask Ned
Carlson of Triode.

Now, there's your answers, but you won't be happy, because once again
the
Garage Trader has told you where to go!!!

Jon