[Boatanchors] Modified AR-88

[Al Klase]

Hi Joe,

When you get to the upper bands aligning any shortwave superhet, it 
becomes easy to align it on the wromg side of the local oscillator.  The 
results are the symptom you describe.  In an AR-88 the oscillator is 
always on the "high side."

Listen for the LO with another receiver.   Set the main dial for 10.000, 
and trim the LO to 10.455 MHz.  Then align the RF stages with a 10MHz 
input. A digital receiver, especially one with memories like a Sony 
2010, can make short work of an alignment job using this method..

Regards,
Al

On 1/19/2010 5:17 PM, Joe Connor wrote:
> OK, some progress and some questions. A larger cap near the audio-gain control stopped the motorboating. The audio is excellent.
>
> I'm having some dial-tracking problems on Band 3. I did an RF alignment at 5.0 mhz and 10.0 mhz and both are spot on. The midpoints, however, are way off. For example, I get CHU (7.850 mhz) at about 8.2 mhz.  Any ideas?
>
>               Joe Connor
>
>
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>    

-- 
Al Klase - N3FRQ Jersey City, NJ http://www.skywaves.ar88.net/