ham radio question
 

kwag, i thought i read were you were a ham radio enthusiast that's why i'm posting this question here:

I have a Hammarlund HQ105TR receiver/transmitter that I'm trying to get ready to put on eBay because it's taking up space. I used the receiver a little bit over 25 years ago but haven't plugged it in since. I just plugged a pair of stereo headphones with 1/4" mono adapter into the headphone jack, turned it on and there was a loud feedback that almost blew my ear out! The volume was turned all the way down. So is this a sign that the unit is bad? Also how can i test the send function (i don't have a mic)

Thanks
ren

Damn ren 8O
Where did you get that :!:
Is this it :?:

http://www.digitalfaq.com/archives/i...2004/02/32.jpg

If I recall, that's a 100% tube transceiver, right :?:
My uncle and my aunt had Hammarlund models, back in the 40's (they were both hams), and I remember as a kid, I found in an old closet one of those, and it was all tubes. Not one transistor in it :lol:

About your noise, it's probably caused by leaky capacitors, because of the age.
That receiver (and most of that age), used a LOT of "Paper Capacitors", which are probably shot by now, and the power supply capacitors, are probably shot too :!:
I recomment to turn on that unit, and leave it on for at least 72 hours, so that all humidity is evaporated out of the circuits.
That's your first shot.
After that time, see if you still get that squeaking noise on the headphones.

As for testing the transmitter, it if works :lol: , you need a "Dummy Load", connected to the SO-239 (antenna) connector on the back. DON'T key (transmit) without the antenna, because you'll damage the final Power Amp tube, because of impedance miss match (happens when you don't have an antenna connected), or a dummy load).

Let me know how you do with that :D

-kwag

That's it! Got it when i was a kid. It's been in the attic for many years. I'll try leaving it on for 72 hrs. Thanks!

http://www.digitalfaq.com/archives/i...2004/02/33.jpg
http://www.digitalfaq.com/archives/i...2004/02/34.jpg

Hi Ren,

I think that what you have there is the Receiver. It's not a transceiver :!:
The "Send" knob, was used to switch "out" the receiver, to key the transmitter, which is another unit. I noticed that, after looking at the back of your picture.
There's no transmitter output tubes there. The transmitter tubes are much larger, so what you have there is a receiver unit :)

Edit: Unless it's a QRP (low power) model, and then I'm wrong.
I'm searching the net now on that model...

-kwag

Oh, ok- I thought it was also a transmitter because of the "send" knob :lol: This thing didn't come with a FM so I couldn't RTFM :lol:

@ kwag (hi ren pal) ..

I gotta admit.. when you know your stuff, you know it !!
No room for Ass-Kissing here :lol: you knew exactly what ren was on about.

Bravo, kvcd man :i:

I remember living in a one-room rental apt, and this guy next room to me
was a HAM'er. I was one who like to sleep to the radio. Well, he would
come home from late night dishwashing (40 year old I think, and had now
life what-so-ever) but he loved to come home and "..breaker, breaker..1-9"
for an hour (2am on) And, my radio would echo his "..breaker, breaker" bullsheet
(sorry for rude language here) nonsense and would drive me in :screwy:
cause I couldn't here my music to put me to sleep :grrr: And, sometimes,
it would make me go :encore: too, and other times, ..make me :banghead:

And, every night, I'd be like.. :Drunk:

Anyways.. I remember he had this huge 30' to 40' white thin attenta connected
to the side of the house. I used to DREAM of cutting the wire !!

Hay, for what it's worth, I used to haul this stuff out of garbage dumps in
my child-hood youth, when I was considered "the genious" in the family.
Only cause I could fix things like these guys :lol:

Take it easy pals..
-vhelp

Here you go ren: http://www.aade.com/hampedia/hamrlund/hammerlund2.htm

It's a HAM receiver, with a CB (Citizen's Band) Transmitter.
So indeed, it's a low power (~5 watts, FCC maximum for CB) transceiver.
Which is kind of odd for a HAM radio equipment :roll:
So I was close, because I couldn't see any high power output stage :D

-kwag

That was a CB'er. Not a HAM :D
HAM radio operator's don't use the "10" code. We use "QAP", "QRX", "QSY", etc. So it's the "Q" code :D
That reminds me when I was 15, I started with a CB radio :lol:
And I spent all night talking bull :lol: That lasted till I was about 17, and then I quit the CB stuff ( started to get get a real life at that time, ARMY, etc. )
It was later (much later, 1989) when I decided to tackle Morse Code, which is needed to pass the HAM license, and I wanted to go all the way (To Extra class, the highest HAM license ) and I did :mrgreen:
http://www.arrl.org/fcc/fcclook.php3?call=kp4qg You could have put a small pin through his antenna cable, and that would have burned up his transmitter as soon as he'd keyed it up :lol:

-kwag