DX-60 Kit: Modern Equivalents

[Noel Page]

- If these are un-built kit parts.
- You should be able to use the original;
Molded Mica
Silver Mica
Disc Ceramic (might still replace these)
feed-through
capacitors, if they are molded "plastic" packaged.
Replace any that wax coated.
- Replace any electrolytic and tubular capacitors as below.
- Replace any 1/2w, 1w and 2w carbon composite resistors.
- Most 1% and 2% resistors should still be ok. (usually not carbon 
composite resistors).
- Most 3w and above resistors are wire wound and should be ok.

BMW wrote:

>I'd use the same kind for all but the tubular. Those are probably paper and
>have changed value. Depending on frequency, I would replace them with
>polystyrene or polypropylene (for LF/audio) or disk ceramic (for HF). Not
>sure about feed-through. Those were probably ceramic. You probably already
>know you should also replace all the electrolytics if you can. The cans may
>be kind of hard to replace. If they aren't leaking, hook them up  to a power
>supply in an RC configuration and measure the time constant, then calculate
>their capacitance. If they check out, go ahead and use them! Or else gut
>them and put some modern tubular electrolytics inside.
>
>You should ohm out the resistors, too. It might be hard to find 1/2, 1, 5
>and 10W resistors in the values they used back then. Check Mouser and
>DigiKey. You may be able to use a lot of the existing resistors, though. Run
>some current through them and see if they change value as they heat up.
>
>Brian, W0DZ
>
>-----Original Message-----
>From: Heathkit Owners and Collectors List
>[mailto:HEATH at LISTSERV.TEMPE.GOV]On Behalf Of paul hendershott
>Sent: Friday, September 09, 2005 8:08 PM
>To: HEATH at LISTSERV.TEMPE.GOV
>Subject: [HEATH-TEMPE] DX-60 Kit: Modern Equivalents
>
>
>Hi Folks! I will be building (yes, and no doubt lowering the value of) a
>Heath DX-60 xmtr kit. I want to order all new resistors and capacitors and
>replace them with their modern equivalents. There are a few different types
>of caps I need help with. What should i replace the following Cap types
>with?
>
>Molded Mica
>Silver Mica
>Disc Ceramic
>feed-through
>tubular
>
>Thanks!
>73
>Paul
>
>
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Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

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