WTB: AM FILTER

[mike bryce]

you know Ed, it would not be at all much of a problem to do a PC board for
the filter. In fact, LMB makes small metal cases that would hold the works
together. about the same size as a heath filter, they are used to pot
electronics. I am sure a filter would fit inside one.

 I have never took a filter apart, so other that crystals and a few caps, I
don't know what's inside.

If i could get a schematic, I could whip out a pc board artwork in a few
hours.

a bulk order from JAN crystals might cheapen up the price a bit on the
rocks.

--
Mike Bryce WB8VGE
SunLight Energy Systems
"Electricity at the speed of light"

> From: Eddy Swynar <gswynar at DURHAM.NET>
> Reply-To: Eddy Swynar <gswynar at DURHAM.NET>
> Date: Tue, 22 Aug 2000 06:48:24 -0400
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: Re: WTB: AM FILTER
>
> Hi Gerald...
>
> I was the fellow who built the SB-310 AM filter "clone"...
>
> You're correct: it was NOT cheap, as such---besides the price of 4 custom
> cut crystals, you also incur the expense of a "regular" Heath SSB filter,
> which is used as the foundation for your new AM jobbie.
>
> Still, considering the rarity of the '310 filter (and the price, should be
> be lucky enough to find one!), the effort is certainly worth it. I would say
> that the cost of construction, as compared to some of the prices seen on
> eBay, make it an even draw...
>
> Oh yes, there IS one added benefit: you're actually doing some
> honest-to-goodness, time honoured, Ham inspired HOMEBREWING by rolling your
> own, & to me that's almost priceless!
>
> ~73~ Eddy VE3CUI - VE3XZ
>
>
>
>
> ----- Original Message -----
> From: "Gerald C. Lemay" <wa1vwl at GROLEN.COM>
> To: <HEATH at LISTSERV.TEMPE.GOV>
> Sent: Monday, August 21, 2000 6:24 PM
> Subject: Re: WTB: AM FILTER
>
>
>> That won't work. It's already been tried by several people. Bandwidth will
> likely be 50
>> to 100 KHz wide. This is what happens when you have a high IF frequency
> such as 3.395
>> MHz. It's all a matter of frequency versus percent bandwidth. There was a
> thread a while
>> back about building a crystal filter with 4 crystals the builder obtained
> from Jan
>> Crystals. It wasn't cheap but then, neither is a 5 KHz filter if and when
> you find one .
>>
>> Ed Richards wrote:
>>
>>> If you want it that wide, try it without any filter. Just put a small
>>> capacitor across the switch contacts.
>>> Regards,
>>> Ed Richards
>>>
>>> On Sun, 20 Aug 2000 22:08:11 -0700 Peter Havens
>>> <pjhavens at CYBERTRAILS.COM> writes:
>>>> Ya'll can laugh if you like, BUT I really am looking for a 3.75 kc
>>>> filter
>>>> for the '301/303, etc. Actually, I would prefer the 5.0 kc unit, but
>>>> who
>>>> wouldn't....
>>>>
>>>> Peter Havens
>>>> KA2SQJ
>>>>
>>>> Listserver Subscription:listserv at listserv.tempe.gov - "subscribe
>>>> heath 'name' 'call'"
>>>> Listserver Submissions: heath at listserv.tempe.gov
>>>> Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff
>>>> heath"
>>>
>>> Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath
> 'name' 'call'"
>>> Listserver Submissions: heath at listserv.tempe.gov
>>> Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"
>>
>>
>> Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath
> 'name' 'call'"
>> Listserver Submissions: heath at listserv.tempe.gov
>> Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"
>>
>
> Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath 'name'
> 'call'"
> Listserver Submissions: heath at listserv.tempe.gov
> Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"
>

Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'"
Listserver Submissions: heath at listserv.tempe.gov
Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"