Re Heath All Wave K1

[Guy Giacopuzzi]

In the 1930's thru the 50"s, you could buy, off the shelf shortwave coil 
sets, usually keyed to capacitor values of a 140uuf or so, for your home 
brewed regenerative receiver....as the popularity of home brewed sets 
declined, they became harder to get, and you could only get coil 
forms...by the 1960's, coil forms were hard to get and those that wanted 
to wind their own coils had to use octal, bakelite tube bases....to 
reverse engineer the coil, you need to know the frequency desired and 
the variable cap used.  I'm sure someone can figure out the proper 
value, then, you may as well wind it on a toroid, and stuff it into a 
coil form, if you can find one....


Guy Giacopuzzi...WA6OQQ...
....a kid in the 1960's who was constantly looking for coil forms for 
his regen's....and wishing he had been born twenty years earlier....

Pat Bunsold wrote:

>Thanks for the link to that site.  This is indeed the rarest of the Heath radios, with probably less than a handful left in the world!  I have never seen or heard of this one before, so production levels must have been very small.  It looks possible to reproduce, but there are a few unanswered questions in it's construction.  
>1) what is the Power transformer?  It says it must produce 12VAC at 12.6A (that seems unusally high.  Must be an error!) and 250V.  They show a very small transformer under the chassis.  That is a very unusual rectifier system they are using, with a 12A6.  The schematic says it is 150V at 10mA and 12V at 1/2 amp.Don't know how they get 250V from that.  
>
>2) wonder what value the audio Output transformer is?
>
>Also, did anyone not be able to print the top half of page 1?  I can see it on the Adobe viewer, but when I print it, every thing above the parts list and 12C8 is blank!  I had to use a screen capture program to catch it!  Don't know why this is happenning!  The rest of the pages are fine, just the first page!
>
>Wonder where you score a 12C8?  12A6s are fairly common, but 12C8s are incredibly rare!  
>
>Guess folks will have to reverse engineer the plug in coils, Will watch this forum hoping someone will come up with what they found.
>73!
>---- Deane McIntyre <dmcintyr at UCALGARY.CA> wrote: 
>  
>
>>On 5-Mar-08, at 5:23 PM, Keith Harvey wrote:
>>
>>    
>>
>>>For those interested in this radio, I have a copy of a review  
>>>published in
>>>the Radio Amateurs Handbook (I don't know which year)
>>>
>>>The review contains circuit, assembly and performance information,
>>>and also has a picture of the finished product.
>>>
>>>I have slowly been accumulating parts to build one from scratch.
>>>
>>>I'll be happy to scan and send a copy to anyone interested.
>>>
>>>      
>>>
>>A reminder that I have this article available on my website
>>
>><http://deane.bio.ucalgary.ca/K-1.pdf>
>>
>>which I scanned when we were discussing this radio in April 2004
>>
>>9th edition (1949) of the Collins (not ARRL) Radio Amateur's Handbook,
>>revised (1953) printing.
>>
>>73,
>>
>>Deane McIntyre VE6BPO
>>
>>-----------------------------------------------------------
>>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!
>>
>>-----------------------------------------------------------
>>This list is a public service of the City of Tempe, Arizona
>>-----------------------------------------------------------
>>
>>Subscription control - http://www.tempe.gov/lists/control.aspx?list=HEATH
>>To post - HEATH at LISTSERV.TEMPE.GOV
>>Archives - http://listserv.tempe.gov/archives/HEATH.html
>>    
>>
>
>--
>Pat Bunsold WA6MHZ
>Curator
>Crest Radio Museum
>
>-----------------------------------------------------------
>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!
>
>-----------------------------------------------------------
>This list is a public service of the City of Tempe, Arizona
>-----------------------------------------------------------
>
>Subscription control - http://www.tempe.gov/lists/control.aspx?list=HEATH
>To post - HEATH at LISTSERV.TEMPE.GOV
>Archives - http://listserv.tempe.gov/archives/HEATH.html
>
>
>  
>

-----------------------------------------------------------
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!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.aspx?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/HEATH.html