18 Mar
2005
18 Mar
'05
2:42 a.m.
Jay wrote:
Yeah, I'll give you a primer on the capacitors on
the TU56.... to get
replacements is about $70 each! For the four motor run caps anyways.
I'll get to refurbing my TU56 "Someday".
I hope to bring my TU56 back to life this year too ...!
One note on the ### motor capacitors.
AFAIK there is a difference between motor *start* caps and *run* caps.
If I am wrong I would like to know, else what is the difference?
- Henk, PA8PDP.
18 Mar
18 Mar
9:54 a.m.
At 08:42 AM 3/18/05 +0100, you wrote:
Jay wrote:
AFIK there's no basic difference in the two types but they do have
different voltage and capacitance ratings. Dig up one of the OLD
electrical machinery text books from the 40s or 50s. They usually had good
descriptions of that kind of thing. the modern text books don't say crap
about motors.
Joe
Yeah, I'll give you a primer on the
capacitors on the TU56.... to get
replacements is about $70 each! For the four motor run caps anyways.
I'll get to refurbing my TU56 "Someday".
I hope to bring my TU56 back to life this year too ...!
One note on the ### motor capacitors.
AFAIK there is a difference between motor *start* caps and *run* caps.
If I am wrong I would like to know, else what is the difference?
- Henk, PA8PDP.
10:16 a.m.
From: "Joe R." <rigdonj at cfl.rr.com>
The only difference that I can find documented is that apparently "start"
caps are not rated for continuous duty, and "run" caps are.
So, as I understand it, the point that Jay made essentially seems to boil
down to the question of whether a "start" capacitor used as a replacement
would hold up in the operating environment of the TU56.
Not knowing anything about the failure modes of motor capacitors, I have no
idea.
Vince
One note on the
### motor capacitors.
AFAIK there is a difference between motor *start* caps and *run* caps.
If I am wrong I would like to know, else what is the difference?
- Henk, PA8PDP.
AFIK there's no basic difference in the two types but they do have
different voltage and capacitance ratings. Dig up one of the OLD
electrical machinery text books from the 40s or 50s. They usually had good
descriptions of that kind of thing. the modern text books don't say crap
about motors. 
19 Mar
19 Mar
4:31 p.m.
On Fri, 18 Mar 2005 09:54:41 -0500
"Joe R." <rigdonj at cfl.rr.com> wrote:
At 08:42 AM 3/18/05 +0100, you wrote:
I work at a place right now that makes motors, and motor-based timers.
These days all the motors are imported from Asia. There's a great
bookshelf in the lab that has all the old classic 'electric motor'
textbooks. A rather dusty shelf, I might add.
This is also the place that uses a Commodore SX64 to test electric
water-valves, incidentally.
Jay wrote:
AFIK there's no basic difference in the two types but they do have
different voltage and capacitance ratings. Dig up one of the OLD
electrical machinery text books from the 40s or 50s. They usually had
good descriptions of that kind of thing. the modern text books don't
say crap about motors.
Joe
Yeah, I'll give you a primer on the
capacitors on the TU56.... to
get > replacements is about $70 each! For the four
motor run caps
anyways.>
I'll get to refurbing my TU56
"Someday".
I hope to bring my TU56 back to life this year too ...!
One note on the ### motor capacitors.
AFAIK there is a difference between motor *start* caps and *run*
caps. If I am wrong I would like to know, else what is the
difference?
- Henk, PA8PDP.
7060
days inactive
7061
days old
3 comments
4 participants
participants (4)
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