{Collins} Re: R-390/URR converting Power supply to Silicon Diodes




It would seem to me that if you put a resistor in series with the diode
(10 - 47 ohms - experiment) it would solve the problem as the inrush current
would partially dissipate within the resistor and it wouldn't affect normal
operation more than a few volts.  In other words the diodes would be looking
at a small resistance on startup rather than a dead short.

73
Lee  ZL2AL - ZL7AA, ZL8RI, ZL9CI, VE3OE

If you want finite limits - Try WAS or WAZ.
If you want a challenge - Try DXCC.
The wall starts around 300
P5 is number 334!

----- Original Message -----
From: Rodney Bunt <rodney_bunt@xxxxxxxxx>
To: <collins@xxxxxxx>; <collins@xxxxxxxxxxxxx>
Sent: Wednesday, June 20, 2001 4:24 PM
Subject: {Collins} R-390/URR converting Power supply to Silicon Diodes


>
> Does any one have a conversion of the R-390/URR receiver to use solid
state diodes in place of the
> 26Z5W Rectifiers, The power supply has a single 10uF capacitor as an input
filter to the Regulated
> B+ supply, the surge current is substantial and destroys 1000v/3A
diodes!!!.
>
> Reason is that the 26Z5W are VERY RARE now.
>
> Rodney Bunt
> VK2KTZ
>
>
> =====
> Regards,
>
> Rodney Bunt
> rodney_bunt@xxxxxxxxx
> M:0414-437412
> F:9899-9451
>
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