Butch:
I have a sighted ham friend here who is good with this kind of stuff, so I
might have him help me take a look.
The supply is a good 14 years old, so I don't think it is unreasonable to
have a problem at this point. ... Maybe I'll get lucky, and it will be
something that can be fixed rather easily.
Will keep you posted.
73 from Tom Behler: kB8TYJ
----- Original Message -----
From: "Butch Bussen" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, June 01, 2012 11:48 PM
Subject: Re: Could it be time to replace My old trusty Astron RS35 Power
Supply?
>A couple things to check. If you are comfortable taking the top off,
> check voltage across the caps. Check output voltage with no load and
> turn supply off and take readingas as it dropps down. If the cap is
> good and the regulator is working, it will hold for a while. Usually if
> the pass transisters go, they short which fires the ovp circuit. On
> many I have rebuilt I've used darlingtons as they usually open instead
> of short.
> 73
> Butch
> WA0VJR
> Node 3148
> Wallace, ks.
>
>
> On Fri, 1 Jun 2012, Tom Behler wrote:
>
>> Thanks, Colin.
>>
>> I'm not too handy with soldering components and the like, so I may have
>> to
>> go the purchasing route.
>>
>> Perhaps if someone wants to use this one as a back-up, as John suggested
>> earlier, I could make a deal and sell it at a nicely discounted price.
>> The
>> supply is over 14 years old, and has been used rather hard, so the fact
>> that
>> caps, a regulator, or something may be starting to fail is not totally
>> surprising to me.
>>
>> Again, I'll think on this for a few days.
>>
>> Keep those thoughts and ideas coming!
>>
>> 73 from Tom Behler; kB8TYJ
>>
>> ----- Original Message -----
>> From: "colin McDonald" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Friday, June 01, 2012 10:21 PM
>> Subject: Re: Could it be time to replace My old trusty Astron RS35 Power
>> Supply?
>>
>>
>>> could be, probably the caps, but it also sounds allot like a regulator
>>> failing.
>>> if the voltage is wandering all over the place like that, then the
>>> regulator
>>> isn't doing it's job, and that isn't just some caps.
>>> I can see maybe a few volts of fluctuation when a load is put on the
>>> supply
>>> if the caps were going...but he said down to 2 or 3 volts? that's a
>>> regulator.
>>> Probably a pretty cheap fix if you want to go that route Tom...maybe
>>> trickier to fix yourself if your not used to soldering etc...but the
>>> regulator components are pretty simple.
>>>
>>> 73
>>> Colin, V A6BKX
>>> ----- Original Message -----
>>> From: "John Miller" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Friday, June 01, 2012 8:15 PM
>>> Subject: Re: Could it be time to replace My old trusty Astron RS35 Power
>>> Supply?
>>>
>>>
>>>> It's probably the capacitors going in it, that happens after a while
>>>> and
>>>> they're easy to replace only held to the board with a couple screws.
>>>> Parts
>>>> can still be gotten. I know a few who've had that problem. If you
>>>> decide
>>>> to
>>>> get a new one, probably another of the same thing is your best bet or
>>>> going
>>>> up on the amperage though I used to run all that and then some off mine
>>>> and
>>>> it never complained. If you get to the point you just don't want to
>>>> deal
>>>> with it and do want to buy something else, Let me know, if my front
>>>> steps
>>>> don't cost too much I'll buy it off you and fix it up for a backup.
>>>> ----- Original Message -----
>>>> From: "Tom Behler" <[log in to unmask]>
>>>> To: <[log in to unmask]>
>>>> Sent: Friday, June 01, 2012 9:54 PM
>>>> Subject: Could it be time to replace My old trusty Astron RS35 Power
>>>> Supply?
>>>>
>>>>
>>>>> Hi, folks.
>>>>>
>>>>> I know we have had similar discussions on the list before, but tonight
>>>>> I
>>>>> feel I have discovered something that may be of interest to others.
>>>>>
>>>>> Basically, over the past few days, I have found that even when
>>>>> transmitting
>>>>> on the resonant frequency of an antenna with a 1.0 to 1 SWR, my TS590
>>>>> seems
>>>>> to fold back to an output power of approximately 50 watts. These
>>>>> power
>>>>> readings have been obtained from both the meter on the TS590, and my
>>>>> TW1
>>>>> talking watt meter.
>>>>>
>>>>> I thoroughly checked all coax and DC power connections, but everything
>>>>> seemed ok.
>>>>>
>>>>> I measured the power supply's voltage first with no load, and it was
>>>>> 13.35
>>>>> volts consistently. However, when I transmitted in RTTY mode with 100
>>>>> watts, thereby putting a full load into the circuit, the DC voltage
>>>>> readings
>>>>> started fluctuating all over the place. They ranged from a high of 10
>>>>> volts, to as low as 2 or 3 volts. Then, on a whim, I connected the
>>>>> Kenwood
>>>>> PS53 power supply that I got with the Kenwood 570 I purchased from the
>>>>> estate sale in our area, and the output power readings were a very
>>>>> solid
>>>>> 100
>>>>> watts, even when the rig was keyed down continuously for several
>>>>> minutes.
>>>>>
>>>>> I know there is a way to adjust the voltage in the RS35, but with the
>>>>> foldback of the ts590, and the fluctuations in voltage readings, I'm
>>>>> now
>>>>> getting a bit nervous about using the RS35 as my main supply.
>>>>>
>>>>> Does anyone have any thoughts or similar experiences to report?
>>>>>
>>>>> If I do need to be in the market for a new power supply, I have
>>>>> several
>>>>> requirements:
>>>>>
>>>>> 1. I'd like it to be a linear supply
>>>>>
>>>>> 2. I'd like it to be something that could deliver at least 40 amps
>>>>> continuously through my rigrunner, because I sometimes run the TS590,
>>>>> my
>>>>> TMV71A, and my TMV7A packet set-up simultaneously.
>>>>>
>>>>> If anyone has specific suggestions regarding a supply that I might
>>>>> wish
>>>>> to
>>>>> consider, please let me know.
>>>>>
>>>>> 73 from Tom Behler: KB8TYJ
>>>
>>
>>
>
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