Sansui specs wanted.

[Max Harding vk3jin]

can anybody help me with the secondary output voltage tappings on the power
transformer for a Sansui stereo receiver model R30 .
The primary is burnt out may have something under the bench that would work
and keep my customer happy.
Circuit no longer available from HCSD.

thanks in advance.
max

 

[Phil Allison]

"Max Harding vk3jin" <

can anybody help me with the secondary output voltage tappings on the
power
transformer for a Sansui stereo receiver model R30 .
The primary is burnt

** Burnt and short circuit ? Or open.

Did you check for an accessible thermal fuse ?



.......... Phil

 

[Max Harding vk3jin]

no thermal fuse in this one. yes it is open circuit.
thanks for the reply Phil.
"Phil Allison" <philallison@optusnet.com.au> wrote in message
news:3fe6d180$0$18385$afc38c87@news.optusnet.com.au...

"Max Harding vk3jin"

can anybody help me with the secondary output voltage tappings on the
power
transformer for a Sansui stereo receiver model R30 .
The primary is burnt


** Burnt and short circuit ? Or open.

Did you check for an accessible thermal fuse ?



......... Phil

 

[Phil Allison]

"Max Harding vk3jin" <

no thermal fuse in this one. yes it is open circuit.

** Overheating trannies do not go open primary without there being a temp
fuse.

You can find out the voltages of the secondary and even the current
ratings with a few simple tests - provided there are no shorted turns.



.......... Phil

 

[Bob M]

I think Phil is right on this one. Every Transformer that I have seen
that had an open primary (I believe the current count is at 6) was
caused by an open thermal fuse. It is usually "hidden" under a couple
of layers of insulation wrapped around the windings of the
transformer. You must be careful when you attempt to uncover it, but I
have used an exacto knife for this purpose with great success. Just
follow the mains winding wires into the transformer's core and one of
them will lead you straight to the fuse. Look for a "bump" in the
insulation. After replacing the fuse with a new one, I used glass
tape, made by 3M, to wrap the transformer back up.

Best of luck with this one!

Bob Morgoch

"Phil Allison" <philallison@optusnet.com.au> wrote in message news:<3fe786ba$0$18385$afc38c87@news.optusnet.com.au>...

"Max Harding vk3jin"


no thermal fuse in this one. yes it is open circuit.


** Overheating trannies do not go open primary without there being a temp
fuse.

You can find out the voltages of the secondary and even the current
ratings with a few simple tests - provided there are no shorted turns.



......... Phil

 

[Phil Allison]

"Bob M" <bmorgoch@sympatico.ca>

I think Phil is right on this one.

** Hey, here is one Canadian I like.

Every Transformer that I have seen
that had an open primary (I believe the current count is at 6) was
caused by an open thermal fuse. It is usually "hidden" under a couple
of layers of insulation wrapped around the windings of the
transformer. You must be careful when you attempt to uncover it, but I
have used an exacto knife for this purpose with great success. Just
follow the mains winding wires into the transformer's core and one of
them will lead you straight to the fuse. Look for a "bump" in the
insulation. After replacing the fuse with a new one, I used glass
tape, made by 3M, to wrap the transformer back up.

Best of luck with this one!

Bob Morgoch

** This method works better with bigger transformers than baby sized ones.

Good, clear description Bob - fibreglass tape is great stuff.




......... Phil

 

[Max Harding vk3jin]

got a circuit which has all the numbers i want
thanks for your help.
"Phil Allison" <philallison@optusnet.com.au> wrote in message
news:3fe786ba$0$18385$afc38c87@news.optusnet.com.au...

"Max Harding vk3jin"


no thermal fuse in this one. yes it is open circuit.


** Overheating trannies do not go open primary without there being a
temp
fuse.

You can find out the voltages of the secondary and even the current
ratings with a few simple tests - provided there are no shorted turns.



......... Phil