The AM Forum

HELLO to all , I just got this out of my garage and well dont have any info at all for it. I Like to get it up and running and hopefuly get it on the air on 80 meters, no manuals or schematics, and I am not much of a tech with out a sc hematics , it will be very hard for me to reverse engineere it, but I made a video on YouTube for all to see and maybe somebody has any information. Thanks again to all on http://www.youtube.com/watch?v=Mmb_sN7An6A the forum.73s.

Hey Peter

I looked at the video. Any chance getting some pics etc. of the inside, especially of the PA tank circuit. Its an interesting looking set up in that rack.

Al VE3AJM

Yes, please do if you can. Very interesting piece of gear.

HI all , yes i can but i need to get my daughter to do for me later after school with her little ipod . :D thanks will do 73s

Hi guys, thank you for your replies, I got my daughter to take the pics for you, please let me know if you can find the schematics it's would mean a lot. So hopefully these pics show you what you need to see! thank u :D 3 pics here

I have three more pictures here.

the last 2 pictures are here and that's about it! hope it useful

So, it looks like a receiver/transmitter complete with speech amp, modulator and PA and power supply.
That is a very interesting piece. Let me ask some of my friends about this. It no doubt has some notable
history worth investigating and just because information may be scant, there are those out there who know.
Thanks for sharing this unusual piece with us!
Happy Thanksgiving,
Billy N6YW

Well, thanks Bill ,yes it is a marine unit,maybe a ship to shore unit ,dont know but some of the crystals are in the 160 meters range, it has a 2182 khz crystal, so it may work,but a sckematic will make my life easy.thats why iam count on you gays here in the forum and keeping my fingers cross. ???

Looks like the transmitter could work on 160m 80m and 40m and points in between. If you have the interconnecting cables, it shouldn't be a huge deal to get that transmitter going with a little bit of work and troubleshooting.

It looks like Andy ::) was looking for information about this transmitter in the past. I trust that you got a good deal on this Peter. ;)

Al VE3AJM

hey . hello Al thanks for that info. and yes i did get it from andy . yes price was very good , i think i only payed him $100 for it cant realy recal, it was a long time ago , and yes i got all the cables ,and i here you on the air all the time with that nice marconi and that deep low end broadcast audio.hope i can get this working and try it out with the boys,73s. 

Peter ve3bkd. 8)

We are all looking forward to hearing you on the air with us on 80m Peter. Get up whatever antenna you can get up in the air and get that Valiant on.

It was only - 6 degrees F out there this morning, but its supposed to warm up a little for the weekend, so better conditions for putting up some wire? ;)

Al VE3AJM

hello Al good morning, i will soon working on it right now waiting for the good weather ,etc. the valiant its on repair i am changing some components etc , but i like to get on the air this mini transmitter, i think it will work good but its  to bad i dont have any info on it and i do need it because iam not so good at it without a sckematics.
peter 73s. :(

All of the Northern radios I have or have seen are "Channelized"   The transmitters use fundamental frequency xtals and have a tuned output for each channel.....They operate between 1.5 and 21 MHz.  I have a radio similar to  that you show in the pictures..Mine is triplet of 6146s mod by a pair....Yours looks like 807s...I will look in the Northern pile when next I go out to the shop...The rxs  have  channelized xtal freqs to match the tx and also a vfo to cover the BC band up to 3 MC ? I have to look to be sure...Northern used good quality components when they built these rigs....Good luck ....Steve

Interesting set.  I've never seen their HF gear.  However, about 10-15 years ago I used their VHF/UHF airborne models for search and rescue.  Quite complex and versatile, with great quality.

 :o O, WOUNDERFUL , STEVE for the info and help iam looking forward  to that and i hope you maybe have something that i can use ,iam not so good at making an sckematic.
STEVE do you have sckematics for yours , even if not the same as mine but may help a bit to investigate the power suply ,etc om my 807 unit.
Peter ,73s  ::)

Attached are 2 photos of the schematics I have...One is the power supply and the other is the transmitter type 529...hope this helps......Steve

 ;DHello STEVE, thank you so much for the sckematics, it was greatly appreciated. Now I can get to work and figure stuff out about it.

  !!THANKS AGAAIN STEVE!  ;D

 Your transmitter and my transmitter are a bit different because yours are 6146 and mine are 807 but some things are a bit different because that.

.. but i did notice that the power supply is almost identicle with the acception of 1 tube. Yours has a 12dsj7 and mine has 6sj7. Also I notices the notes on the power supply scematic my transmitter uses a bit of a different transformer than yours but not much different. Either way its very very close

 You also did a good job taking that picture for me and others. Im sure now this will help me and all the owners of those who own  Northern Radio Company transmitters. I neever thought i could ever find one, but you got me it so thank you once more.

 I will be studying more of the scematics and making notes of the differents between mine and yours ;D Im not an expert but with all the help of you folks here in the forum and in Canada im to get it on the air on 80 meters. As well hoping to hear your on the air.

 Do you by any chance have the scematics for the reciever or any other info related to this we are talking about.  

 Here are some pictures i didnt include last time around.  

I think I have a receiver schematic ....I will look....Steve

Here is the Northern Amp that goes with your Northern tranceiver......2 x 3-500....Channelized..has a separate tuned input and tuned output for each channel.... 6 separate antenna connections...

Nice rig, three 807's modulated by a pair, all those output sections, receiver to go with it....

Just set it up for your favorite frequencies, pick the antenna and talk!

Should be a lot of fun to play with.

Here are the schematics for the Northern 620 rx...There are A thru E models ....(depends on primary operating voltage)..Hope this helps...73    Steve

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 Hi Steve thanks for sharing those scematics since their very valuable and rare to find. You might be one of the only people out there with these copies. However they are helpful for my transmitter and reciever but not the right ones yet. I got it that you dont have the exact scematic for my transmitter and reciever. But if you did Im sure you would of shared it with me and the others in the forum. However they are pretty DAMN close in the power supply section and the transmitter as well with the acception of those I mentioned before.

 I like your amplifiers there definatlly very well built. I think the engineers at Northern Radio Co. did a good job on there units. I wonder if anyone has anymore info but I could be wrong. Keep gathering these units and please dont let them get wasted away.

I'm hoping to get it up and running soon, Im working on it right now. I found some power supply issues, like the 866 rectifiers. Will be swapping those two for a pair of 3b28's for now just to be safe. I'll be powering the power supply by itself. I will keep you poster. And I hope to get it on the air soon

 Steve, i believe your in Alaska. It must be so so cold. Its only about 3 degrees celcious here in Toronto Ontario.

Peter...Glad you got some use from those schematics...They were given to me by Roy, KA7NGT who also has a Northern Txcvr...My Northern radios came from Alaska...The Txcvr was from the Peter Pan Cannery in Naknek...It was the ship to shore radio...The 1000 watt amp came from the Alaska State Troopers...I spend the summer in Alaska and the winter in Washington state....

 Hey, Steve yes im very happy with the schematics, i wonder if your friends Roy kafng7 might have the right scematic for my n515 transeiver or transmitter 807's , the rf deck.

 Those units deffinatly have some value and history. Steve, how are you using your tranciever are you using it as it is or a VFO on it? I'm thinking of doing that because i dont have many crystals. I wonder if its going to work. .

and yes the weather its 11c here today ,how its the weather where you are.

I will ask Roy if he has any more Northern schematics.......I don't think there are any more to be had however....He sent me copies of all the Northern stuff he had...
   These radios are set up to be xtal controlled...A VFO would work ....but because of the radios design, you would have to switch the vfo output to another tuned input section if you wanted to change bands....

Hi Steve, thanks you for replying to all my questions, pictures and schematics.
I have a heathkit vf1 and viking 122 vfo, will it work on my northern radio marine transceiver?
and do you know what the antenna output impedance is, can i just hook a long wire or do i need an antenna tuner, i wonder what type of antenna they used on board the ships.

A local friend sent me this photo of an N562 he ran across.

Philip

Peter...It has been a while since this thread was active...I am working on my N529E S/N 143 right now...I have it on the air on 160 and 75 meters....The ideal antenna impedance is 50-60 ohms and the TX will tune there without the use of the internal antenna matching circuit(s)   I don't see why a VFO wont work if you plug it into the Xtal socket...I wouldn't be afraid to try..   Have you got your TX working yet??   Good Luck...Steve KL7OF