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The S-27 is a fun receiver. When properly restored and used with a good antenna and speaker, this model performs surprisingly well on the FM BCB. ? ? ? ? ? ? ? ? ? ? ? Joe Connor

Image 1 looks like an S-27?? (UHF [sic] receiver)... it used a 955 for the front end... there's a picture of one in the Manhattan Project images... think it was for monitoring the radar-altmeter

Seems in decent shape and I would think the labels could be re-done. -- Justin B. KI5GKD

NYET!!!! -- Dave Hollander N7RK Arizona Tube Supply http://arizonatubesupply.com Ham Radio Page http://n7rk.com

Installed an OA2.? I haver 150 volts at VFO on RX and Tx.? So this cant be the issue. What could cause this Frequency offset?

https://shopgoodwill.com/item/196554053 -- Justin B. KI5GKD

Hi, The HT-37 is still a very popular radio transmitter. The other receivers look a little rough. I'd take all of them. Find homes for the old receivers. There are guys out there that love to bring

> HAM techs > > Attached are pictures of Hallicrafter rigs from 1940-1950. May have been > used on ships, land bases, recreationally or other. They are at an estate > where the spouse of the op wants

NEW member entered... tom nu2w

I noticed that BOTH my radios have an OB2 108 volt gas regulator tube.? The schematic clearly shows a OA2 150 volt tube.? Was this a change or do both my rigs have the wrong tube installed? C

Got the radio back in case and have noticed the frequency is different from rx to tx on LSB and USB. It's. 00 on RX and .97 on TX.? ?I cant think what would fx this behavior.? I have a freq counter

This issue is resolved.? I replaced all components. I used 1n5711 diodes. Two 470 resistors. Matched at 460.? Replaced the .1. Replaced rhe NPO 25pf trimmer.? Deep null now. The other radio can

Ok. I got the Problem resolved. I am not sure what I did wrong Jim.? I Was able to peak T4 and run it down 80%.? Then Null the remaining carrier. With Drive at 0 I get 20w out in tune mode on lower

OK, check the path from C135 to the function switch. If the tube shield on the 12BY7A was lifted and a scope probe connected to it, a plethora of information could be obtained.? This is also used to

I thought I had this finished but went out to the shop, turned it on, and receiver dead!? After poking and probing it seemed like the 18.5 MHz oscillator was running at about 21.6 MHz.? I scrounged

Thank you Jim.? The xtals are not swapped.? They are correct and running at correct frequency.? Actually the LSB .540 instead of .550.? ? Close. I am guessing I must have L15 and 16 off.? The

Heil Sound has a replacement kit for the D -104 you can use either the HC-4 or HC-5 Element. 73 Tony WA4JQS Anthony W.(Tony) DePrato WA4JQS Extra Since 1962 CQ DX HALL OF FAME #35 HONOR ROLL CW RTTY

Good morning, C It sounds like the carrier crystals are swapped. The radio can be fully aligned without switching the HV on. This image shows the carrier peaks as they relate to the filter. Note that

Walt, Jim and others, I have run into a snag during the alignment. I must have made a mistake. I followed Walts paper and the manual and aligned the Filter L15 and L16 That seemed to go smooth. ONE of

We all used the Kobitones 20 years ago. They are all long gone.? I have a personal stash of them and am running low.. I have lost five D104 elements in the last 5 or 6 years. I ran them on six