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Yes, it is balanced on Bands 3 and 4 above 5.3 MHz. But the two coils for the lower bands have no primary windings and terminal A1 connects to the top of the coil for either Band 1 or 2. When the

I have an S-108 in my restoration queue and I noticed that the schematic is exactly the same as the S-85! Maybe there is a small difference somewhere I missed but it's not obvious.? That "wrong" Band

It is a balanced imput. Redraw the input circuits to show the actual wiring without the switch. -- Richard Knoppow Los Angeles WB6KBL SKCC 19998

I think the S-40B and S-85 are constructed so that the link from the antenna terminals couples to the two highest bands as well as the low bands. Redraw the circuit to see how this is done. I find

It would be difficult to rewire the S-40B to allow balanced input on Bands 1 and 2. The S-40A uses transformers with primary and secondary windings and resonance of the secondaries on all four bands.

Well! The email system seems to have stripped the tabs out of my chart, but I hope it's readable. 73, Maynard W6PAP

Hi, Don, I measured my S-40B's antenna terminals with an old analog VOM, so don't take the measurements to be exceedingly precise, but I think that they do tell the story: Band A1-A2 A1-G A2-G 1

Hi, Don, I did check the S-40A schematic and it shows all the input coils wired so that on all bands they can function as balanced input circuits unlike the S-40B and S-85 that leave terminal A2 open

Maynard https://bama.edebris.com/download/hallicra/s85/094-901347-E_Hallicrafters_S-85_S-85U_Mark_1A-1B_Operating_And_Service_Instructions_Feb1958.pdf I did not get that far. My coils between the

Hi, Don, Oops! I lost track of who was doing what here. I have only your diagram, not the S-85 manual, but note that when the bandswitch is set to Band 1 or Band 2, antenna terminal A2 is not

This all just doesn't sound right. Did this receiver EVER work? If it did its not miswired. If it didn't how did it get through factory alignment and QC? How did it get sold in the first place? If

Thanks Larry! I really appreciate it. Our domestic and International clients seem to grow every day. Vintage HI-Fi restoration also seems to be hot. Pete, wa2cwa www.manualman.com On Sat, 8 Feb

Emanuele, no need to reply to this, it is more for others that have an S-85. I don’t blame you for being fed-up with this radio, and giving up; we all have had that feeling, but for the benefit of

Guys, one of the reasons I wants to give up with this one is the poor design in the ANT RF circuitry. I noticed the schematic diagram anomalies, both the 1&2 bands wiring error and the fancy S1A-REAR

Maynard, the arrows inside the wafers do the trick for me, together with the “shown in band 4 position” general note. One of my first obstacles was understanding the first wafer; it was mucking

Pete - I have ordered several manual reprints via your company.? I find the product to be just as good (if not better) than an original.? The Heathkit manuals are sort of a benchmark for me and

Hi Maynard , this was my posting not the OP Emanuele’s but I will convey my understanding. First off: this is one manual version or copy. Perhaps there are others that look correct.. And/or there

Another interesting thing about the diagram: The S-40B diagram has "(FRONT)" and "(REAR)" but not "(FRONT) VIEWED FROM REAR" as for the S-85. The S-40B diagram does show both clockwise and

I agree that the lefthand diagram seems wrong. Note the arrows that show rotation in opposite directions to synchronize the contacts on the wafer as you view each side of the wafer. It seems to me

Thank you, Bill! This site has been very helpful to me. 73, Maynard W6PAP