[Hammarlund] HX-50 Capacitor Replacement (C-174/175)

[Bill Stewart]

Hi Bernie,
I will check with Tom. If he can do it, his price might
not be too far from the price of HV axials needed to replace
the orig. cans. 

I noticed on the tube voltage chart that the highest DC
voltage is 560vdc. I guess the 1200vdc cap spec gives some
head room for the peak DC value. For testing, I may try
using a couple of 47/450vdc axials. That will give me
around 23mf @ 900vdc. That may work 'till I can get the
proper values.

Tnx for the comments...73, Bill K4JYS

----- Original Message -----
From: "Bernie Arcand" <barcand at nccray.com>
To: hammarlund at mailman.qth.net
Sent: Tuesday, September 30, 2014 2:37:39 PM
Subject: Re: [Hammarlund] HX-50 Capacitor Replacement (C-174/175)

Don't just go by what you see on Hayseed Hamfest's page...e-mail Tom and 
tell him what you're needing and he will make a multi-can up for you, 
complete with proper colored wires and identical mounting.



On 9/30/2014 12:59 PM, Bill Stewart wrote:
> GA all,
> Here is some short background info on this project.
> When I first started messing with BAs, around 1999 or 2000
> I ran across this HX-50 at a hamfest. I couldn't walk away
> from it...its one of the best looking rigs made, to me at least.
> However when I got it home, I found the pwr xfmr was shorted.
> A short time later I ran across another one...long story, short...I
> acquired it and put its good xfmr in the orig, slightly better looking,
> transmitter. At that time , having little experience in serious restoration
> work (not much better now)...some problems arose with this
> action and ever since it has been under the bench.
>    
> During the Sep. CX, I worked a couple of HX-50 xmtrs which
> renewed my interest in the project and have decided to try again
> to get it going. So far I have done some cleaning and cked the xfmr
> wiring, which is ok. Previously I had replaced the smaller 'lytics but
> the can types remain. I have had the TO-6A on one of the 40/600
> (C-175) caps for about 5 hrs now and its is pretty well hanging around
> 420V @1.5ma...a long way from its 600vdc spec (higher than  420
> volts runs the current up to near 10ma of leakage). I don't think
> it will go any lower. So, looks like I am gonna need to replace the
> remaining can caps. What leakage current should a good 40/600vdc
> 'lytic have?
>    
> I will need a total of 20mf @ 1200 vdc ea. to replace C-174/175.
> I can hang a bunch of 'lytics, in series, under the chassis, but would
> rather have a neater solution. Anyone know of a source of 40mf/600
> vdc cans. I didn't see any on the Hayseed web page. Or, same value
> in axial 'lytics. Anyone else had to replace the cans, esp the 40/600
> ones? I'm still looking on the web for info, but comments/suggestions
> will be appreciated.
>    
> Tnx..73 de Bill K4JYS
>    
>    
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