Siltronix 1011D Mod

Discussion in 'Radio Circuits, Repair & Performance' started by WA8OCL, Dec 5, 2011.

Thread Status:
Not open for further replies.
ad: L-HROutlet
ad: l-rl
ad: Subscribe
ad: l-gcopper
ad: L-rfparts
  1. WA8OCL

    WA8OCL Ham Member QRZ Page

    Can anyone tell me how to mod the 1011D to operate from 28.300 ~ 29.300, I used to have this info but lost it somewhere. Thanks in advance. Pat WA8OCL
  2. KD8DEY

    KD8DEY Subscriber QRZ Page

    There is a group on yahoo for the siltronix radios.
    The radio should cover 10 meters + receive the 11m band unless it has been modified into a CB

    What you probably need is the CB mod info so you can REVERSE it and turn it back into what it was intended for
  3. W9GB

    W9GB Ham Member QRZ Page

  4. KE6RWB

    KE6RWB Ham Member QRZ Page

    If my memory serves me correct, when you remove the cover off of the VFO unit you will see the adjustable variable capacitors. The air caps could be tuned with a plastic screwdriver to move the VFO up or down on the band. There were also some .001 pf caps tied down to increase or decrease how far you would like to tune the VFO. A frequency counter was needed to follow the adjustments. It was a very simple circuit to adjust. If I had my old 1011C in front of me (it is stored away)I could open it and see how many cap were installed. I think it took a couple of them to achieve to band spread. You also have to remember the dial wont cover the whole 10 meters you will need to switch the band switch and pick up the other portion of the band. I thought I had it to go from 28.300 to 28.500 on one swith and then switch it to get 28.500 to fun.Or you can contact John Bruchey 520-5740247 he was a swan tech for over 35 years.
  5. WD3D

    WD3D Ham Member QRZ Page

    I'm confused, the 1011D I had was just 50 watts output on SSB and it did 28.300 - 29.300 - by just changing the switch on the front.

    It also did the CB radio - AM with about 20 watts from the factory, when the tubes were new.

    The ad you displayed was not for an actual 1011D but a similar model.
    The bottom line is - it's knick name is the drifty 50..

    It's receiver was not bad for what it was - but the phase lock loop - if it had one, left a lot to be desired.
  6. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    The original 1011D used only one 8950 in the PA and although "rated" for "300W PEP input power," that was nuts.

    It also only covered 28.500 to 29.000 MHz for transmitting. Probably every single one that was ever sold was modified to transmit on CB, but they didn't leave the factory that way.

    It was "cheapened down" version of the Siltronix 1011, which really did tune the entire 10m band and actually had a key jack and could run CW. (The "Comanche" 1011D didn't have any way to operate CW; again, it was kind of a "no frills," cheapened down version of the 1011.)
  7. WD3D

    WD3D Ham Member QRZ Page

    The Commanche was indeed the model I possessed at one time.
    All I remember was turning the knob back and forth - trying to find someone to talk to or listen to.

    The dial already had the 11 meters screen printed on the dial - so it was not hard to modify it to work on 11 meters - although I am not sure if it was designed to be operated on the 11 meters, I had converted it back to 10 meters transmit only to protect my license because I had no desire to transmit on 11 meters.

    With the Moonraker I can pretty much talk to anyone I want with my 3 watt am radio here on the desk.
  8. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    I was never a CB op at all, went from SWL to ham ticket. But I did work at a big electronics store as a kid which had a ham-SW-CB department, so I sold that stuff (back in the 60s).

    I had installed an Antenna Specialists "Super Magnum" (or something like that) CB vertical atop our ham radio tower at the store, which was 60 feet of Rohn 45 behind the store, so the vertical was up about 75 feet. The store manager let me select the antenna and the feedline, so I selected 7/8" hardline for it, since we were an Andrew distributor and had a lot of it.

    I'd "demo" the CB gear to interested prospects, using a Johnson Messenger transceiver (3-4W output on AM), using that antenna. We could "work" truckers 60 miles away, all the time, every day. That was the antenna doing all the work.

    Sold a lot of Messengers that way.

    People would come back and complain they couldn't work mobiles 60 miles away, so something was wrong with their rigs.

    So, I'd take the "returned" rig and connect it to the store antenna, and demonstrate we could easily do it. All the time.
  9. K9STH

    K9STH Ham Member QRZ Page

    Siltronix was the brand name that Swan adopted when the ARRL started refusing to let Swan advertise the 1011 in QST because it was just an attempt to sell radios for illegal use on the 11-meter band.

    Also, remember the age old question: On what frequency does the Swan users' group meet?

    Answer: Pick and frequency in the phone band because they will drift across the frequency in just a few minutes! :D

    Glen, K9STH
  10. WN6U

    WN6U Subscriber QRZ Page

    Have you ever considered becoming a lobbyist? :)
Thread Status:
Not open for further replies.

Share This Page