Sidebar Sidebar
  • You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.

How much is a Siltronix 1011D worth?

Update:

I tuned up a dipole in my kitchen. Used a piece of
plastic from a tea container, SO-239 in the middle, PVC
insulators at the ends. Tuned up fine (about 1.2:1), with the
dipole horizontal.

Then I move it to my staircase, so that the antenna
is at least sloping a bit vertically, so that the doughnut
propagation pattern is at least somewhat upright and
omnidirectional. Problem is, the VSWR suddenly got bad,
around 2:1. I put a dummy load on the antenna side,
and the SWR got good again, so it's not the cable.

My guess is that the metal in the walls of the
staircase are screwing up the tuning.

I don't really want to move the antenna outside
because I live in a bad neighborhood, with lots of bored
kids, but it looks like I may have no choice.......
 
wavrider said:
You have an attic?
Click to expand...


Yes I do. Thanks for reminding me!

I take it in general, there is less metal to be found in
most attics? Have you noticed less detuning
when you have moved to your attic?

The only thing is, I won't be able to slope it
as much as I would like to up there....the dipole
will be mainly horizontal.

I've never mounted in an attic before. Any tips?

Thanks.....
 
The search function here at the site is god, several threads for attic installs.

google is your friend also for attic antenna's.

If any way you can get the antenna outside it would be more efficient, and that is what matters the efficiency of the antenna.

Install it on some stand off's at the peak of your roof, run the coax out the eave of the house and no one can touch it.

you will figure out what is best for your install.
 
TRAGEDY HAS STRUCK! :oops:

I was listening to the CB band, and while this guy was
talking, all of the sudden, the S-meter went dead. Initially,
I just thought his signal went out, but then I noticed all the
smoke coming from the big transformer! damn!

I wasn't even transmitting at all! lots of smoke, I unplugged
it quickly of course. I checked the fuse, and it was still good.

I supposed I'll need to get a replacement transformer? The
schematic says a T1701. I tried finding one on the net,
but no luck..... :cry:

Any advice greatly appreciated....
 
Paul678 said:
TRAGEDY HAS STRUCK! :oops:

I was listening to the CB band, and while this guy was
talking, all of the sudden, the S-meter went dead. Initially,
I just thought his signal went out, but then I noticed all the
smoke coming from the big transformer! damn!

I wasn't even transmitting at all! lots of smoke, I unplugged
it quickly of course. I checked the fuse, and it was still good.

I supposed I'll need to get a replacement transformer? The
schematic says a T1701. I tried finding one on the net,
but no luck..... :cry:

Any advice greatly appreciated....
Click to expand...

Do not think it is transformer, maybe caps or diodes, the fuse should have blown to protect the rig. If it had an over amp size fuse then it could burn up the transformer.

There are lethal voltages in that rig, in excess of 800VDC, if you are not confident on working on HV and the safety precautions associated with it then please send it to a tech.
 
wavrider said:
Do not think it is transformer, maybe caps or diodes, the fuse should have blown to protect the rig. If it had an over amp size fuse then it could burn up the transformer.

There are lethal voltages in that rig, in excess of 800VDC, if you are not confident on working on HV and the safety precautions associated with it then please send it to a tech.
Click to expand...


You are correct. I was wondering why the fuse didn't
blow myself. Although the fuse is rather large: 35A, 32V.
Is that the correct rating? It looks like an automotive fuse.

Turns out, 2 of the 1N4005 diodes shorted out. One
of them is even split in half! Much better than the
impossible to get transformer.

I'm an RF engineer, but I have very little tube or HV
experience. I'm more a solid state guy. Do you tube
guys usually use a x10 probe to measure these higher
voltages, especially the AC? My DMM goes up to
1000 VDC, which seems sufficient, but only 750 VAC.

Do you think it's only these diodes? Or should I
check for more problems?

And I'm thinking I should replace all 4 of them.

Perhaps even all 8 of them?
 
Update:

Thanks be to God that it was only the 2 diodes!

I saw a website about re-winding a transformer. It doesn't
look like fun!

Ok, another question: How do I damp all the rattling that
the speaker does? Do most people use like some sort of foam
rubber to damp it out? It gets really bad on large signals, to
where I have to turn the audio down quite a bit.

Or is a certain amount of rattling normal?

Thanks!
 
Use external speaker, the jack is in the back next to the zero set for the meter. 1/4 inch I think.

That speaker is so old it is a wonder it even works.

Can replace the speaker with a new one but hard to find the exact size to replace it with.

I also turn my rf gain down just a little as the receive on those rigs are sensitive and a strong signal will make the speaker rattle hard.

Glad you got it up and running.

Change that fuse to correct amperage, 7 amp I think but double check the schematic.
 
Last edited:
wavrider said:
Use external speaker, the jack is in the back next to the zero set for the meter. 1/4 inch I think.

That speaker is so old it is a wonder it even works.

Can replace the speaker with a new one but hard to find the exact size to replace it with.

I also turn my rf gain down just a little as the receive on those rigs are sensitive and a strong signal will make the speaker rattle hard.

Glad you got it up and running.

Change that fuse to correct amperage, 7 amp I think but double check the schematic.
Click to expand...


Yes, I'll try the external speaker tomorrow. I didn't notice the
jack, because it's labeled "Headphones".

And yes, I'm quite happy it was only the two diodes!

Ok, looking at this:

http://www.cbtricks.com/radios/siltronix/model_1011d/graphics/siltronix_1011d_om_sch.jpg

The only fuse says 4 Amps, and it's also 4 amps on the back on the
unit. Why on earth someone would put a super-thick, automotive type,
35A fuse in this unit is beyond me! I put in a 5A fuse for
now.

I did some research on the Antron 99, and most people
seem to think it's a great antenna for beginners, especially
for the price. They all agree the 5/8ths will kick it's butt,
but for ease of installation and price, it's still consistently used.

I might try to get one....and look for a ladder..... :D

I've got something like 50-60 feet of RG-213/U. Swept
the cable with my MFJ-259B, into a dummy load, and
it looks perfect......
 
Paul678 said:
Yes, I'll try the external speaker tomorrow. I didn't notice the
jack, because it's labeled "Headphones".

And yes, I'm quite happy it was only the two diodes!

Ok, looking at this:

http://www.cbtricks.com/radios/siltronix/model_1011d/graphics/siltronix_1011d_om_sch.jpg

The only fuse says 4 Amps, and it's also 4 amps on the back on the
unit. Why on earth someone would put a super-thick, automotive type,
35A fuse in this unit is beyond me! I put in a 5A fuse for
now.

I did some research on the Antron 99, and most people
seem to think it's a great antenna for beginners, especially
for the price. They all agree the 5/8ths will kick it's butt,
but for ease of installation and price, it's still consistently used.

I might try to get one....and look for a ladder..... :D

I've got something like 50-60 feet of RG-213/U. Swept
the cable with my MFJ-259B, into a dummy load, and
it looks perfect......
Click to expand...

Marconi has some comparisions on the A99 vs 5/8 wl antennas, the results are interesting, just use search function on the site to find his comparisions.
 
I also have a 1011D. But I need a plug and power cord for it. Does anybody have an extra laying around that they would part with?
 
jaybird45 said:
I also have a 1011D. But I need a plug and power cord for it. Does anybody have an extra laying around that they would part with?
Click to expand...

If you look at the schematic you can solder on your own power cord, just take the ground wire to chassis.

schematic available at siltronix yaho group or maybe at CB tricks I did not look.

from time to time the power cords show up on ebay also.
 
schematic available at siltronix yaho group or maybe at CB tricks I did not look.
Click to expand...
Afirmitive The full Schmo is there and shows the hook-up for the power Plug.
And, (as I say a lot) Much thanks to Bennie for all the work that he put`s into his site to provide ton`s of info on Radio`s and Amps.

73
Jeff
 

dxChat
Help Users
  • No one is chatting at the moment.


      Top Bottom
      Back