[AMRadio] Strange rectifier configuration - UPDATE


Clarke, Tom AIR4.0P NATOPS frederic.clarke at navy.mil
Fri Jan 23 10:17:28 EST 2009


Looks like they are after two different regulated voltages - 182 v and
150 v.  I don't know how critical it would be but using 100v zeners
would be a bit out of range - 18v high and 50 v high.

Tom/W4OKW 


-----Original Message-----
From: M. K. Hess [mailto:mkhess at frontiernet.net] 
Sent: Friday, January 23, 2009 9:21
To: amradio at mailman.qth.net
Subject: [AMRadio] Strange rectifier configuration - UPDATE

As an Addition.....

If you'd like to see the full schem. of the unit. Check here on my
website...

Here's the link to the FULL scem.

http://www.d1033982.mydomainwebhost.com/old-mike/Mike/n3eaq_files/BC1H_P
ic/b
c1h1_audio_schem_sm.pdf


Thanks!!!

MK - N3EAQ


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Hi Folks,

I'm working on the audio 1st stage of a Gates BC-1H transmitter. It has
a
rectifier with 4 zener diodes
however, unlike most set ups where there are 4 of the same diode, this
is
using 3 different types, all
of the same class, but with just a wee bit different specs....

It's using:
2x 1N3337A - 75V Zener (540 mA max, 56 Vrev Max)
1x 1N3338A - 82V Zener (490 mA max, 62.2 Vrev Max)
1x 1N3340A - 100v Zener (400 mA max, 76 Vrev Max)

I only note above where the values are significantly different....

I'm just curious... Why do it with these 3 different diodes??? 
What does that buy them?

Would the world end if I used 4 of the 1N3340A - 100V Zeners (since I
have a
slug of them in my parts box) as replacements??

Your sage wisdom is appreciated!

Mike - N3EAQ





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