[ARC5] BC-455 not working

[Tom Lee]

At the risk of sounding like a broken record, did you check the easy 
stuff first? Tweaking a bunch of RF/IF stuff without having done so 
could leave you with a bigger problem than you started with.

Just sayin'.

-- 
Prof. Thomas H. Lee
Allen Bldg., CIS-205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070
http://www-smirc.stanford.edu
650-725-3383 (public fax; no confidential information, please)

On 1/13/2018 4:37 PM, kg4kgl at gmail.com wrote:
> I have already restored a BC-454 and aligned it. So that is not a 
> problem. I have sig gen, frequency counter, and scope.
>
> When I inject the 2830khz signal, where do I check to see if the IF is 
> picking it up?
>
> Tnx,
>
> Robert
> KG4KGL
>
>
> On Jan 13, 2018, at 19:26, Robert Eleazer <releazer at earthlink.net 
> <mailto:releazer at earthlink.net>> wrote:
>
>> If you hear some static but there is no change of any kind in the 
>> sound as you tune the receiver then the most likely problem is the LO.
>> Aside from the obvious possibilities, be sure to check the 
>> connections to the coils under the tuning caps.  The fact that they 
>> are removable by unplugging them makes them vulnerable to the 
>> creation of cold solder joints on the chassis.
>> The first thing to do would be to try putting a 2830 KHZ signal near 
>> the chassis to see if the IF picks it up.  If you don't have a 
>> suitable signal generator a cruder approach would be to take the 
>> cover off the tuning cap and carefully touch each of the connections 
>> to the tuning cap.
>> Good luck!
>>
>> Wayne
>> WB5WSV
>>
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