I am still working on this radio between other repairs.

I have got the antenna coil wired correctly now (1st RF stage).

The 3rd stage is also wired correctly. I am using 10 pfd capacitors for the NC caps.

I am confused with the 2nd stage wiring. I am showing a photo of the 2nd stage that I got off of the internet.

Does anyone know what the component is that is center tapped across the top of the coil? Maybe it is a center tap resistor, it is not on the schematic?

I am not a member of ARF, perhaps someone here is and can reach out to ARF for more information and wiring on this radio.

Thank you,

Mitch

Sir Mitch . . . . With my not being able to touch, rotate, fondle, caress and examine the radio proper, consider that construction as being the manner in which the manufacturer has "home made" the units neutralization capacitor(s). The unit seems to be having two hex spacers that extend . . . .mechanically and electrically . . . . between the stator and rotor connections of the stages tuning condenser and the top / bottom (start and finish ) of the stages tuning coil . Also, the tap onto that coil is brought up with a wire. Looks like the main buss wiring of the set is using square wire. Let's now closely examine the photo, as your unit may have ALL of this having been ripped out. Note the top (and closest) spacer being soldered to about the first 1/16 of an inch of buss wire and it then dissappears within a black "bakelite" ? "spaghetti" and you don't see it reappear again until the top of the picture. There, it shows up again and makes a right angle bend and extends over about a half of an inch and is then being solder connected to a screw on the bakelite sheet at the top of the pic. Next, consider that there is a slightly loose brass tubing sleeve that you see, that is covering where the bottom portion of that black "spaghetti" is again visible and where you start to see it emerging again at the top of the picture. You can see, where close to the ~ center of that brass tubing, that there is a right angle buss wire soldered to it . . . . also having some solder blob/ residues just above it. I suspicion that buss wire that is being within the black tubing is NOT a solid wire, but has some width ? of a gap cut into it, at its ~ center. This would then let that brass tube be moved ~ 1/2 of an inch up or down and then let that central buss wire either favor it's degree of couping to the top or bottom connections, in respect to where it was being physically positioned. To do tuning, one would have to "solderwick" + rosin flux the brass tube of all its blobs and leave a shiny tinned tube and then MEK-or-Acetone -or- Denatured alcohol solvent clean it until being flux free. Prep the center buss wire in the same manner and then "spring" tension it to press against the tinned brass tube . Set the capacitance balance by sliding the brass tube with a plastic tuning stick until optimized and then solder tack the buss and brass tube for locking in tuning, positioning . . . . . as you can see . . . there seem to be two other trial test positions in its past history. Now . . . . . . isn't that, probably. . . . . . the rest of the story ? 73's de Edd

:Hello everyone,
:
:I am still working on this radio between other repairs.
:
:I have got the antenna coil wired correctly now (1st RF stage).
:
:The 3rd stage is also wired correctly. I am using 10 pfd capacitors for the NC caps.
:
:I am confused with the 2nd stage wiring. I am showing a photo of the 2nd stage that I got off of the internet.
:
:Does anyone know what the component is that is center tapped across the top of the coil? Maybe it is a center tap resistor, it is not on the schematic?
:
:I am not a member of ARF, perhaps someone here is and can reach out to ARF for more information and wiring on this radio.
:
:Thank you,
:
:Mitch
:
:
:

Sir Mitch: I'm going to mark up some of your supplied photos to further enhance comprehension of interconnects. However, there seems to be no need of any referencing on the 1st RF coil. With the tuning coil of the 1st RF stage and its mere 3 connections . . . . 1 . . . Antenna wire input to the coils tap. 2 . . . The coils top terminal is going to the 1st grid of the RF tube and the stator of the tuning condenser. 3 . . . The coils bottom terminal is going to ground and the rotor of the tuning condenser. Then there will be the 2nd RF stage, and I have assigned tags of G - L and an added Z. The next area will be your current query on the 3rd RF /Detector stage, which has assigned marker tags of A - F and a deleted D. ( Because it initially appeared as being a connection on the coil , but actually was a standard screw head that was being used in mechanically mounting a tube socket . . . so it was then completely covered up / blacked out. ) Finally, I have placed a thumbnail partial schema of the Freed's RF sections and have then assigned NUMERICAL tags to all of its involved connections. Now I will give my assumptions on my observing your two RF photos and you can then feedback to correct me if I am assuming wrongly. Inspecting the 3rd RF stages photo: To mark up this photo I have added designators A-B-C-E and F , the numbert of which, would be in agreement of a need for 5 connections into that stages RF coil as being shown in the schematic.. Lets initially look at the 3rd RF stage photo, since its the only one showing the entirity view of a tuning condenser. I am seeing my RED X marking up of the two mounting screws of the stator connection of that variable tuning condenser. Do note that an extensioin spacer is being used between the top stator connectioon over to terminal C on the coil assembly. The sole conection to the tuning condenser rotor seems not to be at the rear RED marked up O, but instead, at its very opposite end at Z, where a soldering terminal lug at Z makes a connection extending to the left and over to make a solder puddle connection to chassis ground and a buss wire. Now . . . for my guestimations of the connections to the coil of the 3rd RF stage: I am seeing a black insulated buss wire that is going down from coil terminal E and then down to what looks like, making a connection into the detector stages grid leak and grid coupling capacitor. Up at coil connection C, it seems to start and pass down, with a temporary obscuring of view by a black bakelite rod, until it is then seen passing on down to another different connection being made into, possibly, the detector stages grid leak resistor / coupling capacitor. The B coil connection is being made by the bare buss wire extending over to chassid ground at Z. Coil A connection of the tuning coil is being made with the hex aluminum spacer that is seen extending over to the variable tuning condenser stator connection . As for F, you will have to fill me in on, IF it is actually making a valid connection into the coil unit, as it appears to be. Inspecting the 2nd RF stages photo: The iniutial assignment of designators G-I-J-K and L seem to agree with there being a need for 5 connections into that RF coil as shown by the schematic.. Starting with closest I connection, it just seems to get a copper wire connection from the coil winding and then have a buss bar that is extending to the left and popping out of sight, and it likely, then going to a chassis metal ground connection. J connection is getting its initial connection to the hex spacer that goes to the left and makes a connection to the stator connection of the tuning condenser. You seem to have a black jumper wire running from J across to Z. Is there a coil connection being made to Z, or does Z then just make connection to the screw and nut that is making connection to your temporary fixed neut disc ceramic capacitor coming up to that juncture ? K connection just seems to take on a coil winding connection and then be passing down a buss bars connection to a chassis metal ground tab. L seems to connect to a coil winding connection and then take a buss wire that goes down and then routes in a line along the bottom chassis, towards the 3rd RF stage. G seems to also take on a coil winding connection and then . . . if your green wire color coding is in agreement . . . . it then routes to the grid leak / capacitor connections into the 1st grid of the 3rd RF/det circuitry. Still wondering . . . if there is being a direct connection between term Z and the lower nut-screw connection below it, which is then connected to the RED STARRED fixed ceramic condenser ? Finally: Tell us WHICH of the now assigned ALPHABETIC tags are being the equivalent interconnections, that you have made, to the now NUMERICALLY designated connection points being shown on the SCHEMATIC photo. PHOTO REFERENCES: 73's de Edd Artificial intelligence usually beats real stupidity . . . hands down.

::I am using 10 PFD capacitors for the NC capacitors, any ideas what the real factory values should be?
::
::
:10 pF is in the ballpark. These should really be adjustable caps so that each RF amp stage can be neutralized to minimize "birdies" using a dud tube with one of the heater pins cut off. However, if the set works without an unacceptable level of squealing, maybe this is pointless... at least for this set of RF tubes.
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