Re: {Collins} 30L-1 --- soft start and power supply * realy Bd



Good evening, John.

Ref. question 1:  You confusing a "soft start" with a "soft key".  The "soft start" powers up the power supply gradually over a few hundred milliseconds, allowing the capacitors in the power supply to charge up with a lesser current surge.  General consensus seems to be that this isn't needed with the 30L-1, and anyway the type of exciter you use has no bearing on it.  The "soft key" converts the keying voltage, typically around -170V in the 30L-1, into something that newer rigs can handle without blowing up, typically +12 volts or so.  That is absolutely necessary in order to use the 30L-1 with most modern "rice box" rigs, probably including the FT-2000D.

Ref. question 2:  I have a 30L-1 in which I replaced the original power supply board with Young Kim's design, and it works fine.  Since then, Don, K4LAJ in Florida, has begun producing a 30L-1 replacement power supply board at a significantly lower price.  I have one if his boards in my other 30L-1 and it works perfectly.

Rick WA1RKT


----- Original Message -----
From: "John Altman" <wa4aip@xxxxxxxxx>
To: "collins" <collins@xxxxxxxxxxxxx>
Sent: Monday, November 17, 2014 5:39:46 PM
Subject: {Collins} 30L-1 --- soft start and power supply * realy Bd

I have a 30L-1 due in this week ... it is supposedly low usage (2 owners)
and "original" ...

Questions please ...

1.  some have said a soft start is necessary in order to use with my Yaesu
FT-2000D ?

2.  anyone dealt with or know of Young Kim - K6HM - a CA power supply
engineer who has
     designed and sells complete Power Supply and Relay Board upgrades?
His units are
     complete in that they are not "kits."

I realize there are several updates/mods that I may elect to perform (or
maybe not HI) but these two items seem to be high on the list.

Your comments will be greatly appreciated.

Regards,
John
WA4AIP:



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