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

[Eric van de Weyer]

Hi Henrik,

 

I have an Electus account and am prepared to order, in bulk, if sufficient
people want parts. This is why I quoted the Electus prices in my previous
email.

 

My suggestion is that people decide what parts they want from Electus (same
part numbers as Jaycar, of course) and we get together at the next meeting
and sort out what needs to be ordered.

 

I'll also be at the club on Saturday. 

 

73....Eric VK2VE.

  _____  

From: members-bounces at us.cactii.net [mailto:members-bounces at us.cactii.net]
On Behalf Of Henrik Stenstrom
Sent: Monday, 30 July 2007 11:19
To: W.A.R.S. Members List
Subject: Re: [Waverley ARS] Can someone help me make this, Pwr supply

 

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 

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