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Wrong way tuner
3/25/2009 5:08:58 PMBrett
My Crosley 66TA’s indicator mounts directly onto the tuning shaft but as the indicator moves up the scale the frequency actually goes down. For instance if I’m at 1100 and move toward 1600 the frequency drops toward 800. Any ideas?
Thanks, Brett
3/25/2009 5:39:15 PMLou
Strange

It sounds like you are on the wrong IF.

You should first check the frequency of the LO as the dial is changed. The LO should be higher or greater in frequency than the IF ( using subtractive mixing).If the LO is wrong , everything else gets messed up.

The If should be tuned to 455 Kc ( or 262 Kc for older sets). If it is something else , it will have to be at the subtraction of the incoming minus the LO frequency.

Lou

: My Crosley 66TA’s indicator mounts directly onto the tuning shaft but as the indicator moves up the scale the frequency actually goes down. For instance if I’m at 1100 and move toward 1600 the frequency drops toward 800. Any ideas?
:Thanks, Brett
:

3/25/2009 6:56:45 PMZ-
My Crosley 66TA’s indicator mounts directly onto the tuning shaft but as the indicator moves up the scale the frequency actually goes down. For instance if I’m at 1100 and move toward 1600 the frequency drops toward 800. Any ideas?
:Thanks, Brett

IF You can tune the whole frequency range but mirrored, I'd gess someone has replaced the tuning capacitor with the wrong one.

I've seen it happen on a Northern Electric where the same radio was offered with two dials but mirrored; 1600-550 for one and 550-1600 for the other.

Syl

3/25/2009 9:24:54 PMThomas Dermody
I have a Westinghouse iron that does the same thing--burns the clothes on synthetic and barely steams on linen.

Sorry. Couldn't think of anything better to say. I thought I had some ideas, but I think that Sly and Lou have hit the likely ones.

T.

3/26/2009 2:59:21 AMeasyrider8
:I have a Westinghouse iron that does the same thing--burns the clothes on synthetic and barely steams on linen.
:
:Sorry. Couldn't think of anything better to say. I thought I had some ideas, but I think that Sly and Lou have hit the likely ones.
:
:T.

Thomas, Sounds like you need to turn the plug around, the electrons and coming in the wrong side.

Dave

3/26/2009 11:32:29 AMLewis L
::I have a Westinghouse iron that does the same thing--burns the clothes on synthetic and barely steams on linen.
::
::Sorry. Couldn't think of anything better to say. I thought I had some ideas, but I think that Sly and Lou have hit the likely ones.
::
::T.


Maybe the radio is upside down.
Lewis
:
:Thomas, Sounds like you need to turn the plug around, the electrons and coming in the wrong side.
:
:Dave

3/26/2009 12:23:36 PMBill G.
: My Crosley 66TA�s indicator mounts directly onto the tuning shaft but as the indicator moves up the scale the frequency actually goes down. For instance if I�m at 1100 and move toward 1600 the frequency drops toward 800. Any ideas?
:Thanks, Brett
:
Hi Brett,
Check the dial string. It may have been strung improperly.

Best Regards,

Bill Grimm

3/26/2009 12:31:01 PMZ-
:Hi Brett,
: Check the dial string. It may have been strung improperly.

..."indicator mounts directly onto the tuning shaft"

3/26/2009 2:26:39 PMEdd














OOOOhhhh !. . . .thats the Crosley with its large, easy to read
dial scale bezel, along with its larger 6 in speaker directed out
one side.

Lets see now, what info-solution can be provided on that set:


Initially look at my photo of the rear of the unit and observe the
blow--up pic of. . . le tune-eeeng condensateur. . .

I have marked up the OFFSET pivot point of the rear ball bearings location for the rotor. That rotor, as it is shown, is almost open.
And. .presently its sitting at a mechanical positioning of 1410 kc. . . to be vewy-vewy precise!

Moreover the black print on its rear lets my macrovision seek
out the EIA identifier number. . . .which tells us THAT radios
particular tuning condenser is a product of General Instruments. . . and if I could definitively make out the next four numbers,
they would be the single year digit and the next two digits
would be the week of the date of GI’s manufacture. ( Or. . . ‘til
they got around to stamping it on!)

Additionally, my provided parts list number referencing is in
agreement with the deeply pressed in metal stamping of the
unit as shown, where it appears whitish with an additional “A”
suffix.


Now, from a REAR viewing perspective referencing. . . if one
were to move and reposition that rotor by hand, it would then
require it being moved CCW in order to fully mesh the plates
and be at its maximum capacitance position in order to then be
tuned to the VERY lowest end of the BCB.



Sooooo since that tuning condenser pulley, affixed to the front
of that tuning condenser. . . . .as you say . . .is then directly
connected to the dial pointer, that jibes with the shown system
then being properly tuning to 550 Kc with the frontal dial
POINTER then being at max CW rotation, which is also in full
agreement with the dial scale of the radio cabinets dial bezel
being at 550 on the right side of it.
(Of which, I have also provided a frontal cabinet photo.)



Now. . .Time Out. . . .to check out your unit and see what the
Situation is with YOUR units Tuning Condenser versus frontal
bezel.

Lastly:


The I.F. on the unit is definitely 455 KC.

The unit HAS an RF stage at the front end, alas, but with a R/C load
on its plate circuitry versus a fully tuned L/C resonating circuit instead.


Now, IF it EVEN proves out to be any question, after the past mechanical
confirmations.
Your sets local oscillator on the BCB , with its dial scale tuning
set to 540 should be putting out a CW signal at ~995 Kc, and
then if you were to tune slowly up to ~1385 on its dial scale,
it should then be putting out a 1740 Kc signal from its oscillator.



Soooooo. . .if you were monitoring on a vewy small portable AM
transistor radio receiver that is placed near to the Crosleys
oscillator coil, you should then be able to hear the quieting. . .
or the carrier hum on the transistor receiver as the Crosley is
tuned onto that frequency.


Synopsis:


The Crosley when, set to 540Kc, should be able to be heard on
the xstr monitor, coming in at ~1385. . .then slowly raise the
Crosley’s frequency tuning , whereupon the carrier should walk
on upwards in frequency when monitored / tracked with the xstr
receiver.
That, being possible, up to the Crosleys final setting of ~1385
whereupon the end of the xstrs dial scale tuning limitation of ~1740 would
then no longer let you track a higher local osc frequency.


At least, you then KNOW that you are having / mixing LO +455 Kc tuning.





73's de Edd













Cross-legged Model 66TA . . . . . Tech Referencii :








3/26/2009 8:33:39 PMplanigan
: My Crosley 66TA’s indicator mounts directly onto the tuning shaft but as the indicator moves up the scale the frequency actually goes down. For instance if I’m at 1100 and move toward 1600 the frequency drops toward 800. Any ideas?
:Thanks, Brett
:

Brett, you said the indicator was attached directly to the shaft? That's true in most sets, but the tuning is done through some string arrangement which may be backward in this set. I think I saw some string in the photo Edd place on board. The tuning knob is below the tuning cap so it has to be string or gearing. Now you have two possibilities = mechinical/electrical. PL

3/26/2009 8:38:19 PMWarren
If it is a dial cord operation, when you turn the tuning knob the dial needle should go in the same direction.
3/26/2009 10:22:47 PMBrett
It's not the dial cord, you can remove the dial cord and tune by hand. The indicator is on the main shaft.
Thanks, Brett
3/27/2009 8:14:53 AMflip the dial glass
:It's not the dial cord, you can remove the dial cord and tune by hand. The indicator is on the main shaft.
:Thanks, Brett
3/27/2009 11:58:53 AMEdd















flip the dial glass



With the JOKER here. . . . . BATMAN certainly can’t be very far away ?



! TNERAPSNART NEVE TON SI GNIHT EHT dna . . . . srebmun drawkcab tnatluser eht fo lla tuoba woH

Brett. . .Brett. . .Calling Sir Brett. . . come in please. . .can you hear me now ?

Brett. . . . We read your comment on hand turning of the rotor of the tuning condenser, WHICH has the dial pointer connected
TO the end of the frontal dial drum, so, as you mentioned, the proper stringing of same is a moot point.

The question now is. . . . if when you rotate the rotor such that the plates are fully meshed. Is that done with a full CW
rotation of it ? (Referenced to. . . when you are facing the front of the tuning condenser).


Did you FULLY digest all of my earlier posting ?





73's de Edd







3/27/2009 6:34:43 PMBrett
No I did not, sorry.
3/27/2009 4:46:08 PMkr
:It's not the dial cord, you can remove the dial cord and tune by hand. The indicator is on the main shaft.
:Thanks, Brett

the wires on your tuning condenser might be reversed

3/27/2009 6:37:39 PMBrett
Is that possible? Would it cause this? I know this radio has been worked on before but I don't know to what extent.
3/27/2009 8:32:28 PMLewis L
:Is that possible? Would it cause this? I know this radio has been worked on before but I don't know to what extent.


No, for this kind of a capacitor, it couldn't care less how the cap is polarized, except maybe what's hot and what's ground.
Lewis

3/27/2009 8:44:49 PMbill
:Is that possible? Would it cause this? I know this radio has been worked on before but I don't know to what extent.

Is is possible that the dial glass is not the correct one?

3/27/2009 9:09:59 PMNorm Leal
HI Brett

Here is what it should look like:

http://www.crosleyradios.com/66ta.html

This radio dial is reverse from most other US made radios.

Norm

: My Crosley 66TA’s indicator mounts directly onto the tuning shaft but as the indicator moves up the scale the frequency actually goes down. For instance if I’m at 1100 and move toward 1600 the frequency drops toward 800. Any ideas?
:Thanks, Brett
:

3/27/2009 11:55:33 PMA little humor
:HI Brett
:
: Here is what it should look like:
:
:http://www.crosleyradios.com/66ta.html
:
: This radio dial is reverse from most other US made radios.
:
:Norm

Play it in front of a mirror
:
:: My Crosley 66TA’s indicator mounts directly onto the tuning shaft but as the indicator moves up the scale the frequency actually goes down. For instance if I’m at 1100 and move toward 1600 the frequency drops toward 800. Any ideas?
::Thanks, Brett
::



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