[Test-Equipment] Hickok 288X signal generator--update

[Carl]

The published resistor voltage ratings has plenty of overhead; 350V is not 
excessive in receivers, test equipment, and many transmitters for a 1W film 
one.

Carl


----- Original Message ----- 
From: "Steve Byan" <stevebyan at verizon.net>
To: "Discussion of Electronic Test Equipment" 
<test-equipment at mailman.qth.net>
Sent: Tuesday, April 22, 2014 6:46 PM
Subject: Re: [Test-Equipment] Hickok 288X signal generator--update


>
> On Apr 21, 2014, at 10:12 PM, Brian Burns <brian at lessonsinlutherie.com> 
> wrote:
>
>> I figure that it's poor economy to use less than the best replacement 
>> parts,
>> and would really appreciate recommendations for types of caps and 
>> resistors
>> to use, as well as what supplier to get them from.
>
> I buy most of my parts from Mouser: www.mouser.com
>
> Any modern film resistor, either carbon or metal, will do fine. Watch the 
> voltage rating though; some of the newer metal film resistors are 
> physically small for their power rating, and so sometimes the max voltage 
> rating is not high enough for tube circuits. I'm thinking of standardizing 
> on the Vishay/BC Components PR0200 series of 2 watt metal film resistors:
>
> <http://www.mouser.com/ds/2/427/28729-239785.pdf>
>
>
> Replace the paper caps with modern film caps. I just buy 630 volt rated 
> caps, as the modern dielectrics are so much better that you don't need to 
> use a lower WVDC rated cap to get the cap to physically fit in the space 
> allowed. I prefer axially-leaded caps rather than radial; I think they are 
> easier to install in the original layout. I like the Mallory 150-series 
> caps, now made by Cornell Dubilier:
>
> <http://www.mouser.com/Cornell-Dubilier/Passive-Components/Capacitors/Film-Capacitors/_/N-9x371?P=1z0z819Z1z0wx8wZ1z0zlgfZ1yzn99gZ1yznbzr>
>
>
> For electrolytics, I find that restuffing the original cans makes for the 
> neatest installation, so I prefer the new small diameter (10 and 12 mm) 
> radial leaded electrolytics. Be sure to get the ones rated 105 degrees C 
> or above, rather than the 85 degree C ones; you want the higher temp 
> rating for tube gear.
>
> <http://www.mouser.com/Passive-Components/Capacitors/Aluminum-Electrolytic-Capacitors/Aluminum-Electrolytic-Capacitors-Leaded/_/N-75hqwZscv7?P=1z0z7l5Z1yzskniZ1z0vhz5Z1z0wuodZ1z0iy1kZ1z0vo1pZ1z0wtxnZ1yzh254Z1yzh23sZ1yzh25k>
>
> Best regards,
> -Steve
>
> -- 
> Steve Byan <stevebyan at me.com>
> Littleton, MA 01460
>
>
>
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