[Waverley ARS] Can someone help me make this, Pwr supply

[Henrik Stenstrom]

Hi All,

 

It would be nice to take advantage of the wholesale pricing available
through Electus as the best price I've been able to find for the same
transformer elsewhere is about $72 or 40% more.

 

Does the club have an account with Electus or is it easier for an
individual to purchase wholesale than it actually seems to be?

 

Sorry if I'm a bit slow on the uptake here!

 

Thanks,

Henrik - VK3FHHS 

________________________________

From: members-bounces at us.cactii.net
[mailto:members-bounces at us.cactii.net] On Behalf Of Eric van de Weyer
Sent: Friday, 20 July 2007 6:49 PM
To: 'W.A.R.S. Members List'
Subject: Re: [Waverley ARS] Can someone help me make this, Pwr supply

 

Hi Everyone,

 

I have been doing a bit of research on components for building power
supplies. 

 

Jaycar have some nice toroidal power transformers which are ideal for
the project. They are part number MT2132 which is rated at 18 + 18V at
16.6A continuous when wired in parallel. These can be obtained through
Electus for $45.15 each down to 34.90 each in 5 up quantities. These
will quite easily do 20A peak

 

The ZR1324 Bridge rectifier is rated at 35A and can be obtained for
$3.02 in 1 off or $2.40 in 10 off quantities. 

 

LM723 regulators are under $1 each

 

There are various transistors which can be used. There is the ubiquitous
2N3055 although I don't really favour it these days as there are far
better ones on the market now. 

 

Cases and heatsinks are often a matter of what you might have available
at the time or how you want to encase the supply. Providing it is safe,
it is more a matter of preference. Even so, a new one can be purchased
for around $10-12 with more than adequate ratings.

 

Electrolytic capacitors will cost a little more. Probably between $20 &
$30 and Jaycar does not have a particularly good range. There are other
sources, though.

 

73....Eric VK2VE.

________________________________

From: members-bounces at us.cactii.net
[mailto:members-bounces at us.cactii.net] On Behalf Of Daniel Walters
Sent: Friday, 13 July 2007 13:48
To: W.A.R.S. Members List
Subject: [Waverley ARS] Can someone help me make this, Pwr supply

 

Hey everyone,


i am looking to make a 20amp power supply @ 13.8 volts. is someone able
to help me make this, the thing is i dont know the prices for it yet. 


the diagrams are on an attached pdf





-- 
73

Daniel Walters
VK2FDGW

Web: www.qrz.com/vk2fdgw
Ftp : ftp://vk2fdgw.myftp.org

mobile: 0423173300 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://us.cactii.net/pipermail/members/attachments/20070730/c1110504/attachment-0001.htm