diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Tubes / Valves (http://www.diyaudio.com/forums/tubes-valves/)
-   -   Help on transformers please (http://www.diyaudio.com/forums/tubes-valves/203375-help-transformers-please.html)

Sgkho249 29th December 2011 10:34 AM

Help on transformers please
 
Hi all, I need help to identify the usage of these transfomers. Is it worth keeping? Thanks
http://i697.photobucket.com/albums/v...9/DSC_0051.jpg
http://i697.photobucket.com/albums/v...9/DSC_0050.jpg

Thanks.

Original Burnedfingers 29th December 2011 12:11 PM

Take a picture of each transformer instead of the group. One looks like an output transformer but I cannot read anymore than that.

Sgkho249 29th December 2011 12:41 PM

Ok, here it is,
http://i697.photobucket.com/albums/v...9/DSC_0054.jpg
http://i697.photobucket.com/albums/v...9/DSC_0056.jpg
http://i697.photobucket.com/albums/v...9/DSC_0055.jpg
http://i697.photobucket.com/albums/v...9/DSC_0053.jpg

The one in black with wire sticking out is T52-158 a-as-rlc that it?
Thanks

tranqspogi 29th December 2011 01:13 PM

once identify the Primary and the Secondary. the Primary is the higher Ohms than the secondary ...

Sgkho249 29th December 2011 01:57 PM

Quote:

Originally Posted by tranqspogi (Post 2838288)
once identify the Primary and the Secondary. the Primary is the higher Ohms than the secondary ...



Thanks. But I really know nothing about it. What are the useage and which one are you refering too. Of all the 5 pcs which are those that I can build a amp with it. Stereo or mono.

Thanks for the help.

boywonder 29th December 2011 02:02 PM

Quote:

Originally Posted by Sgkho249 (Post 2838162)
Hi all, I need help to identify the usage of these transfomers. Is it worth keeping? Thanks

Yes, they are quite useful, and worth keeping.

The Parmeko "Neptune Series" 6000/71 is a power transformer with selectable 200-250VAC mains and 250V and 350V secondary taps @ 180ma. Assuming that you are in a 230-240VAC country, this would be very useful for a SE amp. It has a 3A 5V winding for tube rectification as well.

The Gresham "inductor" is a 20H choke rated at 70ma. This would be great for a preamp CLC power supply, as the current rating is a little low for a power amp.

The Lux OY-15 appears to be a 3.8K PP output transformer with screen grid taps which is also very useful for a PP amp. The multiple secondary impedances as well as the screen grid taps will allow many possibilities for output tubes. This can operate in Triode, UL, or pentode mode.

Since it appears that you have a single output transformer, you can entertain building a MI amp.

Please confirm that the stamped numbers are "3.8K", they are a little hard to make out in the pic. Roughly how large is this transformer? maybe a picture with a few other common items would be useful, as you'll need to determine/guess the power rating for this one.

Can you post another close up pic of the other Parmeko transformer? The existing pic is too blurry to make out.....

Sgkho249 29th December 2011 02:59 PM

Quote:

Originally Posted by boywonder (Post 2838329)
Yes, they are quite useful, and worth keeping.

The Parmeko "Neptune Series" 6000/71 is a power transformer with selectable 200-250VAC mains and 250V and 350V secondary taps @ 180ma. Assuming that you are in a 230-240VAC country, this would be very useful for a SE amp. It has a 3A 5V winding for tube rectification as well.
(Thanks, yes im in 230v country.)

The Gresham "inductor" is a 20H choke rated at 70ma. This would be great for a preamp CLC power supply, as the current rating is a little low for a power amp.
(Thanks, whats a CLC power supply.)


The Lux OY-15 appears to be a 3.8K PP output transformer with screen grid taps which is also very useful for a PP amp. The multiple secondary impedances as well as the screen grid taps will allow many possibilities for output tubes. This can operate in Triode, UL, or pentode mode.
(Thanks, heres the pic http://i697.photobucket.com/albums/v...9/DSC_0058.jpg its a 6.6k)


Since it appears that you have a single output transformer, you can entertain building a MI amp.
(Thanks, whats a MI amp,mono intergrated,)

Please confirm that the stamped numbers are "3.8K", they are a little hard to make out in the pic. Roughly how large is this transformer? maybe a picture with a few other common items would be useful, as you'll need to determine/guess the power rating for this one.

Can you post another close up pic of the other Parmeko transformer? The existing pic is too blurry to make out.....

(Thanks, heres the pics http://i697.photobucket.com/albums/v...9/DSC_0061.jpg. Its a 10H 180ma what can it use for?

The black transformer is without any specs. Its T52-158 A-AS-RLC. What is it use for. http://i697.photobucket.com/albums/v...DSC_0057-1.jpg

Thanks again.

boywonder 29th December 2011 07:16 PM

The 10H 180 ma choke would work great in a CLC SE power amp power supply. I imagine that it came off of the same amp as the 180ma power transformer.

If you are looking for a beginner project to use some of this iron and have a circuit board to build on, consider the TubeLab Simple SE. Tubelab George sells the PCBs for about $35 + shipping. This is a cathode biased design using common output and driver tubes. You could use the power transformer and the 10H choke for this no problem. There are lots of other SE designs on the forum here as well.

Since you only have one output transformer, you'll have to pick up a pair to do a stereo SE amp. Consider the Edcor XSE series, very affordable and a great value.

http://www.tubelab.com/Simple_SE.htm

Where are you located?

Sgkho249 30th December 2011 03:47 AM

Hi boywonder, thanks I will have a look how simple to build it. Anyway do you know about this trans. http://i697.photobucket.com/albums/v...SCk_0057-1.jpg

Im in Singapore

boywonder 30th December 2011 01:00 PM

Quote:

Originally Posted by Sgkho249 (Post 2839188)
Hi boywonder, thanks I will have a look how simple to build it. Anyway do you know about this trans. http://i697.photobucket.com/albums/v...SCk_0057-1.jpg

Im in Singapore

The photobucket link doesn't work.......


All times are GMT. The time now is 08:47 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2