[NJARC] Request for Information

[Al Klase]

Hi Martin,

Some comments below:

Martin Minnicino wrote:
> Question 1 - When the radio is turned on, there is an approximate 30 
> second delay (during which the radio appears dead), then I hear a 
> "click", then the panel light comes on and the filaments begin to glow, 
> 20 seconds later the audio comes on.  Is this "initial" delay normal for 
> this radio, and why ?  Also, when the panel light and filaments do 
> finally fire up (after the initial delay), the panel light glows 
> extremely bright for about one second and then diminishes to a dim level...
>
All bets are off until the tube filaments warm up. They are 
wired in series, and the pilot lamp is in parallel with a 
portion of the rectifier tube filament.  Short flash of the 
pilot light if normal in most of these sets, but usually 
happens just after turning the main switch on.

That said, I'm confused by the initial 30 second delay.  Is 
the click electronic, i.e. through the speaker?  Or is ot a 
distinctly mechanical click?  Is there a click when you 
first turn the control? the switch may be sticking for a few 
seconds.


> Question 2 - The dial on the radio is labeled for both the BC and POLICE 
> bands, but I can only receive the BC band and there is no visible 
> mechanism for switching to the POLICE band (?)

The schematic clearly shows a band switch.  Is it, perhaps, 
one of the push button positions?  If there's a 7th button, 
thats it.  I count Tunable BC plus five presets on the 
schematic.

> 
> Question 3 - The second of three knobs appears to be a tone control, but 
> there is no response from it until it is rotated fully counterclockwise, 
> at which point  it softens the audio but sometimes causes a squeal at 
> the same time (?)

That sounds pretty typical of the tone controls in radios of 
this sort.  All it does is cut the treble.  However, I don't 
see a tone control in the schematic.

Radios of this age are likely to have multiple, 
hard-to-pin-point, problems until you get the old paper caps 
out of them.

I have the Rider's Manuals on the desk,  Let me know if you 
need copies.

Regards,
Al

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