Amidon substitute?
Philip de Cadenet
T-50-12 or 17 mix. It must have a permeability of around 4.
I require a 1/2" torroid to use as an output transformer in a VHF RF
amplifier stage.
I have looked at Fair-Rite products, who I believe are now owned by
Amidon but have had no joy.
It seems Amidon do not have an official, or unofficial UK distributor.
I do not really wish to import from the US in relatively small
quantity's if I can find the components here in the UK.
Any idea's?
--
Philip de Cadenet G4ZOW
Transmitters 'R' Us
http://www.transmittersrus.com
Roy Lewallen
iron parts came (and still come, as far as I know) from Micrometals. I
don't know of anyone else who makes equivalents of Micrometals
low-permeability parts. I suggest that you contact Micrometals, or check
their web site, to find a UK distributor for their parts.
Fair-Rite makes ferrites, not powdered iron. I'd be amazed if Fair-Rite,
an old and established company with a very large commercial customer
base, was bought out by Amidon, started as a garage retail operation by
Bill Amidon primarily to sell small quantities of Fair-Rite and
Micrometals parts to amateurs. But stranger things have happened.
Roy Lewallen, W7EL
Leon Heller
"Philip de Cadenet" <Philst...@thebbc.fslife.co.uk> wrote in message
news:jii7pto6...@fslife.co.uk...
> I'm trying to find an equivalent by another manufacturer to Amidon's
> T-50-12 or 17 mix. It must have a permeability of around 4.
>
> I require a 1/2" torroid to use as an output transformer in a VHF RF
> amplifier stage.
Sycom stock some of the Micrometals toroids, including the T-50-12:
Leon
--
Leon Heller, G1HSM
leon_...@hotmail.com
http://www.geocities.com/leon_heller
Avery Fineman
writes:
>The part you describe is powdered iron, not ferrite. Amidon's powdered
>iron parts came (and still come, as far as I know) from Micrometals. I
>don't know of anyone else who makes equivalents of Micrometals
>low-permeability parts. I suggest that you contact Micrometals, or check
>their web site, to find a UK distributor for their parts.
>
>Fair-Rite makes ferrites, not powdered iron. I'd be amazed if Fair-Rite,
>an old and established company with a very large commercial customer
>base, was bought out by Amidon, started as a garage retail operation by
>Bill Amidon primarily to sell small quantities of Fair-Rite and
>Micrometals parts to amateurs. But stranger things have happened.
When Bill Amidon started his little business, both Micrometals
and Fair-Rite would sell their products in minimum quantities.
Micrometals had 100-piece minimums on direct orders; still did
until three months ago. Amidon would repackage into small
quantities for sale in electronics hobbyist stores and received
permission to reprint certain Micrometals Q curves and technical
information in those repackages. Very handy for hobbyists.
Bill Amidon retired in 1990 but his little business continues as
part of www.amidon-inductive.com and that company continues
with the radio hobbyist line. One can mail-order parts and
kit packs from them. Amidon-Inductive takes VISA or Master-
card. Their on-line order form indicates foreign (to USA) sales
are possible.
Micrometals specializes in powdered-iron core products. They
have a good website for technical information at www.micrometals.
com. They have two free DOS-based programs for power and RF
inductors, also a couple Application Notes on RF inductors. Their
whole catalog has been on CD since June but one can order parts
of their catalog. I recommend the Q-Curves section, 30 pages of
graphs. Good product line that has been valuable to me for over
two decades.
Len Anderson
retired (from regular hours) electronic engineer person
Philip de Cadenet
>Sycom stock some of the Micrometals toroids, including the T-50-12:
>
>http://www.sycomcomp.co.uk
Yes, this company were suggested earlier in this thread.
I spoke with Robin earlier today6 and have placed an order.
Thank you again.