[NJARC] Broadcast band tracking on Emerson model CY288

[Vourtsis, Philip (Phil), ALABS]

Al,
  Aaron was able to point me to a decent copy
of the schematic. It shows C4 connecting to one
of the grids on the 6A8GT tube. C1 is also in
parallel with C4 and is adjustable. What is that
all about (2 caps in parallel both adjustable).

Phil Vourtsis
Pres.- New Jersey Antique Radio Club

EE Humor
Resistance may be futile but capacitance has potential


-----Original Message-----
From: njarc-bounces at mailman.qth.net
[mailto:njarc-bounces at mailman.qth.net]On Behalf Of Al Klase
Sent: Friday, September 24, 2004 12:24 PM
To: New Jersey Antique Radio Club
Subject: Re: [NJARC] Broadcast band tracking on Emerson model CY288


Hi Phil,

This set is in Riders 11 page Emerson 11.  I had to search 
on CY(space)288 to find it.  The electronic copy is 
difficult to read.  I'll scan the original if you need it.

You'll want to tweak the oscillator padder condensor, C4, to 
align the low end of the broadcast band.  (Trim high - Pad 
low.)  The "padder" is IN SERIES with the oscillator coil. 
from it's "cold" end to ground. I'd expect a compression 
variable cap with lots of plates.  The "trimmer" is in 
parallel with the coil/padder combination and aligns the 
high end of the tuning range.

Regards,
Al

Vourtsis, Philip (Phil), ALABS wrote:

>    I'm working on an Emerson CY288 with Ingraham cabinet
> and there is something funny with the tracking. The stations
> on the high end of the dial seem ok but when I get to the
> low end the lowest frequency station I get is 770 (WABC) and it
> appears at around 570. I recapped and it made no difference.
>   I looked up this model number in Sams index and it was not
> listed. The model is stamped on the chassis and is quite clear.
> It looks like 30's vintage with a disguised dropping resistor in a 
> metal tube envelope and only one IF can. Any help is appreciated.
> 
> Phil Vourtsis
> Pres.- New Jersey Antique Radio Club
> 
> EE Humor
> Resistance may be futile but capacitance has potential
> 
> 
> _______________________________________________
> NJARC mailing list
> NJARC at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/njarc
> 
> 
> 

-- 
Al Klase - N3FRQ
skywaves at webex.net
Flemington, NJ 08822
Web Page:  http://www.webex.net/~skywaves/home.htm
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