[Johnson] Invader VFO Modification

[David C. Hallam]

Roy,

http://www.tubedepot.com/can.html

They have new 4 section cans that will work but the price is a little 
steep when I need several.  There are 4 cans in the 606B 2- 120/40 uF 
@475V, 1 - 20/20 uF @450V, and one that I can see down in the set but 
haven't gotten to it to find out what it is.  I haven't been able to 
identify it on the HP replaceable parts list.  To me they are not 
logically organized.

One other thing I haven't figured out yet is that what I think are the 
two 120/40 uF cans are not the same size.  One is longer than the other. 
  I haven't been able to read the markings on the lower can because it 
is mostly buried.

David
KW4DH

On 8/6/2013 1:29 PM, Roy Morgan wrote:
>
> On Aug 6, 2013, at 8:44 AM, David C. Hallam <dhallam at knology.net> wrote:
>
>> (fitter caps bad) ... I have contacted most of the usual sources and replacements are going to be a challenge.
>
> Dave,
>
> I also have an HP-606 and will be glad to hear of your success in the filter caps.  I wonder if 475 volt caps are needed: check the turn-on surge voltage to find out.  For my 606, replacement can caps would not be needed: I'd just install them wherever they would fit.  But after finding out what the below source has, I might well get can type units.  An email to them might bring details of the surge rating of their  450 volt caps.
>
> This source is well regarded:
>
> justradios.com
>
> In Canada: good people, good prices, good service.
> They do have 500-volt axial lead electrolytics, and single and dual section cans at 500 volts (no triple cans)
>
> The axial leads they have:
>
>            E-caps @ 500 Volts (axial)	
> 10uF at 500V axial	$2.25
> 16uF at 500V axial	$2.59
> 20uF at 500V axial	$2.79
> 22uF at 500V axial	$2.99
> 30uF at 500V axial	$3.69
> 40uF at 500V axial	$4.49
> 50uF at 500V axial	$5.49
> 100uF at 500V axial	$7.49
>
> And dual can caps:
>
> Dual Section RG & JJ Ecaps @ 500 Volt ( Cans )
> ( Clamp Mount Type with Solder Lug Leads )
> 10uF+10uF RG 500V	$8.99
> 16uF+16uF RG 500V	$9.99
> 20uF+20uF RG 500V	$11.99
> 30uF+30uF RG 500V	$13.99
> 32uF+ 32uF JJ 500V	$8.69
> 40uF+40uF RG 500V	$16.99
> 50uF+50uF JJ 500V	$10.89
> 100+100uF JJ 500V	$11.99
>
> Check their XLS ordering sheet for all sorts of other caps.
>
>
> Roy Morgan
> k1lky at earthlink.net
> K1LKY Since 1958 - Keep 'em Glowing!
>
>
>
>

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