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View Full Version : siltronix 1011d mod info



d_bro2001
07-30-2017, 12:07 AM
im trying to bring this old slippery old goat back to life. was going to do the mod to open the transmitter up on both bands, it looks way to easy. it said to locate the two green wires at the back of the band switch, then jumper across the terminals they are soldered to. sounds simple enough right? when I get my jumper ready to solder to the first to the first green wire terminal and I notice those green wires have both been cut and aren't hooked up to anything but that switch. any ideas where those green wires go to when they leave the band switch. ive heard this mod done other ways but not cutting the green wires completely out

d_bro2001
08-06-2017, 04:12 AM
oh come on guys! I know all the stigma related to the swan/siltronix 1011D. is it so bad that nobody wants to admit they own one? please guys. if you know someone that has one or if one is hiding in your closet I just need someone to take off the cover and tell me where those two green wires go to after they leave the switch. I would be grateful for anyones help if they know where they can get a look at one. okay ill go back to the seventies and wait for someones reply..i'll be over there blasting the KISS records

DK039
09-23-2019, 12:05 PM
I was looking for some info for my 1011D when I came across your post. I'm a new member, and a newbie to this forum thing, and I hope my reply makes it to you. The two green wires coming off the band switch are routed under the chassis through a hole below the switch. Looking at the rear wafer of the switch (the rear panel of the radio facing you), the top half of the wafer has six terminals. Starting from the left, we'll call the terminals 1 thru 6. The number 5 terminal green wire goes to relay K-1 under the chassis, to the solenoid coil terminal toward the front panel of the radio. (On the other K-1 solenoid coil terminal should be a white with red and blue stripes wire.)

The other green wire from the band switch, connected to pin 1 of the rear switch wafer, is also routed thru the hole, under the chassis. That wire goes to a five-lug terminal strip located close to relay K-1, between K-1 and the rear apron of the chassis (positioned perpendicular to the rear apron). Counting the lugs, starting closest to the apron, 1, 2, 3, 4(Ground), 5. That other green wire connects to lug 5 of that terminal strip. On lug 5 there should also be two yellow wires there already.

I hope you haven't given up hope on that rig, I know your post is over two years old.

nosaj
09-23-2019, 08:08 PM
I just started going through one on a recap. My suggestions for anyone. Get it working first then mod.

nosaj

DK039
09-27-2019, 06:09 PM
Good advice, nosaj. On a number of radios I've had to undo the mod to get them to run right. 73.

nosaj
09-27-2019, 06:47 PM
In case anyone is interested Hayseed Hamfest put together a cap kit for me for the siltronix 1101d. About $60 but that includes the cap can. Their products are great.
nosaj
N1EBC

Bobcat
09-30-2019, 02:59 PM
They do custom work???


In case anyone is interested Hayseed Hamfest put together a cap kit for me for the siltronix 1101d. About $60 but that includes the cap can. Their products are great.
nosaj
N1EBC

nosaj
09-30-2019, 04:42 PM
I believe so they can make whatever you want, affording it is the question :)
nosaj N1EBC

DK039
10-19-2019, 11:56 PM
I agree that Hayseed Hamfest capacitors and re-cap kits are of high quality. I've used their products on a number of vintage tube radio refurbs with satisfactory results. Particularly for the chassis-mounted aluminum can, multi-section types that are no longer available through typical distributors, especially where physical size and form factor are a concern. I find that their prices are reasonable considering the the caps have 105 degree C rating which translates to extended cap-value/working-voltage derating curves.
73, DK039

Oklahoma Cude
04-23-2021, 11:58 AM
2476Has anyone seen this mod replacing the balance modulator?

nosaj
04-23-2021, 02:49 PM
Id have to say I'm not really sure what we are supposed to see. Do you have an annotated schematic for it?
nosaj

DK039
04-30-2021, 12:50 AM
Hi, Oklahoma: It looks like the factory mod for a solid state balanced modulator. It replaced V13, the 6JH8 Beam Deflection tube during the last production runs of the 1011D. Unfortunately, there is no factory documentation that I can find, but the device they used appears to be a Motorola MC1496, or a National Semiconductor LM1496 balanced modulator DIP. If you lookup the spec sheet for the device, you should be able to use the design examples as a guide as to how the circuit board is wired, and how it's wired into the radio. Yours is the first example I've ever seen. Good luck, and please post what you find out. Tnx!

Oklahoma Cude
04-30-2021, 03:41 PM
Thanks for the response, It eases my mind somewhat. I will explore MC1496 and LM1496 for information to see if I can find how the board is wired. I finished rebuilding the power supply and am am about ready to start alignment and tuning.
Again-Thanks DKO39 for the response