OEP A2623E out of stock everywhere?
- Thread starter aviel
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ruffrecords
Well-known member
aviel said:
Are you sure that number is correct? It is not recognised by Farnell.
Do you mean A262A3E?
Cheers
Ian
iprovlek
Well-known member
Here is the link for it!
I think that this trannie is on stock...
https://export.farnell.com/oep-oxford-electrical-products/a262a3e/transformer-1-1-6-45-6-45-150/dp/1172344?st=oep%20transformer
I think that this trannie is on stock...
https://export.farnell.com/oep-oxford-electrical-products/a262a3e/transformer-1-1-6-45-6-45-150/dp/1172344?st=oep%20transformer
Newmarket
Well-known member
iprovlek said:
Out of stock til Feb (the Vigortronix 'equivalent' suggested is in stock):
Awaiting Delivery
Available for backorder to lead times shown
Check stock and lead times
More stock available week commencing 11/02/19
Contact me when back in stock
Alternatives Available
1674302 - Audio Transformer, Encapsulated, 150 ohm, 6.25 kohm, Through Hole
£11.96
ruffrecords
Well-known member
What are you planning on using this for?
Cheers
Ian
Cheers
Ian
pvision
Well-known member
Canford have three in stock
https://www.canford.co.uk/Products/23-053_OEP-A262A3E-TRANSFORMER-Analogue-audio-PCB-general-purpose
Nick Froome
https://www.canford.co.uk/Products/23-053_OEP-A262A3E-TRANSFORMER-Analogue-audio-PCB-general-purpose
Nick Froome
ruffrecords
Well-known member
For a FET input mic pre I would recommend using A187A15C. It has a better spec and is enclosed in a mu metal shield.
Cheers
Ian
Cheers
Ian
Newmarket
Well-known member
aviel said:Yes sorry meant the A262A3e.Canford have minimum of 35 euro per order, thats annoying.
I will use it as mic input transformer for a FETboy preamp i am building
IIRC Canford are fairly strict on 'Business Only' customers ?
ruffrecords
Well-known member
Newmarket said:
I have never had any trouble buying from them.
Cheers
Ian
ruffrecords
Well-known member
aviel said:
And at least 3 times the performance. For a mic input transformer you must have a mu metal shield to minimise the possibility of hum pickup.. For good bass response you need an adequate primary inductance. The A262A3E is about 0.5H. The one I suggested is 10 times that. You might be OK if you only use high output low source impedance condenser mics with it. With a 150 ohm mic though, the A262A3E will have a -3dB point at about 50Hz.
Cheers
Ian
rock soderstrom
Tour de France
https://de.rs-online.com/web/p/products/2106425/?grossPrice=Y&cm_mmc=DE-PPC-DS3A-_-google-_-3_DE_DE_Audio-Transformatoren_OEP_Exact-_-OEP+-+Audio-Transformatoren+-+2106425-_-a262a3e&matchtype=e&kwd-303020808658&gclid=EAIaIQobChMIhLaVppyE3wIVhbHtCh32VwAiEAAYAiAAEgLzkvD_BwE&gclsrc=aw.ds
There is a mu metal housing for this transformer, you have to buy it separately. (and yes, you need it) I have used small Beyerdynamics in my build, too. You can find them on ebay sometimes. They are no bass monsters aswell and its good to have the PAD before the transformer with them.
There is a mu metal housing for this transformer, you have to buy it separately. (and yes, you need it) I have used small Beyerdynamics in my build, too. You can find them on ebay sometimes. They are no bass monsters aswell and its good to have the PAD before the transformer with them.
If anyone is interested I have in stock Mu Metal cans for the trafo (made by Vigortronix Audio transformers (United Kingdom)). Please note that they have made replicas of the discussed trafo. There was a thread about Vigotronix here...
http://diy-tubes.com/index.php?route=product/product&path=25_72&product_id=285
http://diy-tubes.com/index.php?route=product/product&path=25_72&product_id=285
ruffrecords
Well-known member
aviel said:
Unfortunately not. The impedance of the quoted series primary inductance of 0.5H is just 63 ohms at 20Hz and this sits right across the input. It does not help that the quoted frequency at which this is measured is 1KHz because in just about every transformer, the inductance increases as frequency drops but for it to look like 600 ohms at 20Hz it needs to increase by ten times.
The transformer I recommended has a quoted primary inductance of 5.3H at 100Hz which is both a much better figure and a more sensible measurement frequency,
The only way to be certain is to buy the cheap one and measure its inductance at 100Hz
Cheers
Ian
ruffrecords
Well-known member
ungifted said:
Vigortronix I believe was set up by ex employees of OEP. Perhaps they did not like the prospect of being taken over by Carnhill.
Cheers
Ian
Newmarket
Well-known member
ruffrecords said:
There's some (disputed) history here (see posts 11 and 13 in the thread):
https://www.gearslutz.com/board/geekslutz-forum/76065-belclare-tf10015-substitute.html
Interesting. People logging in to GS just to write a single post, then leave?
There's probably more to it. Like who prompted these two old gentlemen.
Jakob E.
There's probably more to it. Like who prompted these two old gentlemen.
Jakob E.
Newmarket
Well-known member
gyraf said:
Yes. It's an old thread but obviously some 'axes to grind'.
I feel kinda 'bad' going on GS - it could be a path to madness- like reading BTL comments in the local press
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