[Heathkit] My Heathkit SB - 300 update ( help with AM needed )

Mon, 11 Aug 2003 18:33:37 -0400

Steve:

Yes, it won't work in the AM position if there is no filter installed.
You would have to copy AM in the USB or LSB positions and zero beat the
carrier. AS I recall, the AM filter sold by Heath was 3.75 KHz. 

I wonder of it would be possible to homebrew an LC filter? At that I.F.,
an LC filter would be pretty broad, though.

			73,

			Bob WB2VUF

Steven Raas wrote:
> 
> Hello everyone.. upon recieving my heathkit sb-300, i opened it up n fiddled with it.. the s-meter did not work.. fixed that ( a small adjustment ).. the lil freq marker dident turn that plastic disk.. fixed that... and tweaked the coils for optimum recieve....
> seems to be working great.. i q-tipped the whole inside.. and notw its very nice n clean..... no dust.. or grime.. ect....cleaned everything.. and it really nice now.. ty for all ur help and ideas! Its on 40m right now.. listening to a lil ssb roundtable.. hasent budged or drifted off freq at all !
> 
> There is only 1 thing that im not sure about yet... and that is the AM reception. Does the internal AM filter need to be installed for AM reception? If so.. what is a respectable price to pay for an original / not origional that works well.. ide like a 7-10 khz filter for good audio clairity on AM.
> 
> Also what AM filters were available , what were their bandwidths? a 5 kc filter is too narrow in my opinion.. this is where i would stray from a ' stock ' filter.
> 
> Thank you.. and have fun! This was a neet lil project.. that is daynm near completion.. all i really needto do is test all the tubes.. i have a hunch their all ok.
> 
> 73's
> 
> -Steve Raas
> N2JDQ
> 
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