Power Transformer Amveco Magnetics

First post

I am currently trying to put my first GSSL. I run into a little problem trying to locate power supply transformer from Amveco Magnetics 62063-ND. DigiKey shows :roll: 6 month lead time, which is kind of long in my book. Hence, I am looking for 30 VA 120 Volt primary 15-0-15 V secondary transformer at a reasonable price.
I have not selected 19" chassis - I can go to 2U high (rather not)

Any ideas for internet / mail order suppliers in USA?

Par Metal in NJ has great chassis. 8 inch deep is all you need. Can't help with the PT.

TE62083-ND

Try Avel Lindberg's website. They have what you're looking for, for less money and they are very nice to deal with.

http://www.avellindberg.com/

Might I suggest the Y236103?

where do you buy them then?

Send them an email for a price quote, then call in your order with a credit card. Very fast turnaround. They have some values at PartsExpress too.

First - Thank you all for the feedback.

After some additional thoughts I went with TE62084-ND 18V 2.776A, 50VA Transformer from Amveco Magnetics (Digikey). Reason for this selection are two fold:

1) TE62084-ND is in stock (2/1/06) and available from DigiKey (I had to order the rest of the BOM from DigiKey for GSSL clone)

2) After doing some additional analysis 18 Volt transformer is more appropriate for this power supply implementation. In this project a dual complementary rectifier circuit is driving a typical LM7815/7915 linear voltage regulator(s). Transformer output can be calculated using a following formula:

Vac=(Vout + Vreg + Vrect + Vripple)/(1.414 * 0.9)

Vout DC Output from the linear regulator circuit
Vreg Voltage drop across the regulator is approximately 2.5Vdc or more
Vrect Voltage drop across the rectifier is approximately 1.25Vdc (4 diodes)
Vripple Ripple voltage is approximately 10% peak of the output voltage.
0.9 is a rectifier diode efficiency.

For 15 Vdc output:

Vac=(15.0 + 2.5 + 1.25 + 1.5)/(1.414 * 0.9) = 15.9 Vac

LM7815 can replaced with LDO LM2940-15 from National Semiconductor. LM2940-15 is only rated for 1Amp, but it has 0.5 V volt drop out rating vs. 2.5 Volts for LM7815. If LM2940-15 is used a 14.34 Vac secondary is required. 15 Volt or 14.34 Vac secondary leaves little or no margin for error, 120 Vac mains, etc.

My two :grin: cents worth on this subject?