Restore HW8

[mike bryce]

the hw-8 is a CW only QRP transceiver that covers 80, 40, 20 and 15 meters.

it utilizes a direct conversion receiver. transmit power is about 2 watts
give or take

it's built on one large pc board with a very small audio board tacked to the
side of the cabinet.


heath used a zillion switching diodes to select the different bands. if you
have an hw-8 that does not work on one band, be it transmit or rec you can
bet the farm its a switching diode problem.

the HW-8 is built using left over parts. the HFO coils as well as the HFO
crystals can be stolen from a broken HW-101...


Main problem to look out for besides the switching diode problem is the main
tuning capacitor being run into its stops and pulling the plates out of
itself. A rather unfixable problem without a replacement VFO capacitor.



Mike Bryce WB8VGE
SunLight Energy Systems

http://www.seslogic.com
http://www.theheathkitshop.com

"Electricity at the speed of light"

> From: Neil Morrison <neilsmorr at hotmail.com>
> Reply-To: Neil Morrison <neilsmorr at hotmail.com>
> Date: Sat, 29 Dec 2001 12:26:00 -0800
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: Re: Restore HW8
>
> This would be the worst way to troubleshoot anything.
> I assume an HW8 is a transceiver? AM?
> If so, start at the oscillator, and move towards the output stage. Each
> stage should add to the output - does it? You will find there is some point
> at which there is no gain, either in voltage or power. Look at that stage.
>
>
> Regards,
>
> Neil
>
>
> ----- Original Message -----
> From: "David C Thompson" <penpro at BIGPOND.COM>
>
>
>> Hello friends
>>
>> Stupid question
>>
>> Has anyone "taken a heathkit apart and reassembled it it"
>> If it has a fault which is not easily traceable, is this an alternative?
>> My thanks to all in anticipation.
>>
>> David VK2NH
>
> -----------------------------------------------------------
> This list is a public service of the City of Tempe, Arizona
> -----------------------------------------------------------
>
> Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
> To post - HEATH at LISTSERV.TEMPE.GOV
> Archives - http://interactive.tempe.gov/archives/HEATH.html
>
>

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

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