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#1
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.. I have had an S-38 on the shelf for a few years and finally got
around to recapping it this weekend. All went well and it does play but not as well as I figure it should. I did find one loose wire that is attached to S1B terminal “O” and goes nowhere. There is another lead attached to that same terminal which goes to the antenna terminal lug 4. I don’t see this extra lead on the circuit diagram and it does appear to be a lead that was there when the rig was built. It look like a cream colored lead with red stripes. I wonder if anyone has any idea where this lead is supposed to go? I |
#2
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Radio wrote:
. I have had an S-38 on the shelf for a few years and finally got around to recapping it this weekend. All went well and it does play but not as well as I figure it should. I did find one loose wire that is attached to S1B terminal ?O? and goes nowhere. There is another lead attached to that same terminal which goes to the antenna terminal lug 4. I don?t see this extra lead on the circuit diagram and it does appear to be a lead that was there when the rig was built. It look like a cream colored lead with red stripes. I wonder if anyone has any idea where this lead is supposed to go? I Was that a "gimmick" (a capacitor made by twisting two wires together)? Geoff. -- Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM |
#3
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![]() "Radio" wrote in message ... .. I have had an S-38 on the shelf for a few years and finally got around to recapping it this weekend. All went well and it does play but not as well as I figure it should. I did find one loose wire that is attached to S1B terminal “O” and goes nowhere. There is another lead attached to that same terminal which goes to the antenna terminal lug 4. I don’t see this extra lead on the circuit diagram and it does appear to be a lead that was there when the rig was built. It look like a cream colored lead with red stripes. I wonder if anyone has any idea where this lead is supposed to go? I There is a readable S-38 manual at Nostalgia Air and I think also at BAMA. From the schematic neither wire belongs there. The terminal on the bandswitch goes to the top of the secondary of the RF transformer for Band-2. My schematic shows only three antenna lugs and they are not numbered. I suspect that both wires may have been someone's modification. The "gimmic" mentioned by another poster is used for the BFO and is not in this section of the RX. I have an S-38 and could look at the bottom if you like but have no way to make photos of it. -- Richard Knoppow Los Angeles WB6KBL |
#4
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On Jun 15, 12:15*pm, Radio wrote:
. *I have had an S-38 on the shelf for a few years and finally got around to recapping it this weekend. *All went well and it does play but not as well as I figure it should. *I did find one loose wire that is attached to S1B terminal “O” and goes nowhere. *There is another lead attached to that same terminal which goes to the antenna terminal lug 4. *I don’t see this extra lead on the circuit diagram and it does appear to be a lead that was there when the rig was built. *It look like a cream colored lead with red stripes. *I wonder if anyone has any idea where this lead is supposed to go? *I Hi Guys, Thanks for the help so far. I made an error in my posting! The other lead that is attached to S1B terminal "O" goes to lug 4 on the antenna coil NOT the antenna terminal. I will send you a picture Goeff and Dick Thanks, Karl |
#5
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![]() "Radio" wrote in message ... On Jun 15, 12:15 pm, Radio wrote: . I have had an S-38 on the shelf for a few years and finally got around to recapping it this weekend. All went well and it does play but not as well as I figure it should. I did find one loose wire that is attached to S1B terminal “O” and goes nowhere. There is another lead attached to that same terminal which goes to the antenna terminal lug 4. I don’t see this extra lead on the circuit diagram and it does appear to be a lead that was there when the rig was built. It look like a cream colored lead with red stripes. I wonder if anyone has any idea where this lead is supposed to go? I Hi Guys, Thanks for the help so far. I made an error in my posting! The other lead that is attached to S1B terminal "O" goes to lug 4 on the antenna coil NOT the antenna terminal. I will send you a picture Goeff and Dick Thanks, Karl OK, when I get the picture I will open the bottom of my S-38 and see what there is. -- Richard Knoppow Los Angeles WB6KBL |
#6
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You may already know this - C25 inject the BFO oscillations. It is a simple
wire wrapped around an detector wire. You can see C25 in this schematic: http://www.nostalgiaair.org/PagesByM...2/M0008862.pdf I do remember finding a strange wire on the S-38 that I recently restored. It killed band 2. I compared the actual circuit to the schematic and put it back to the schematic. You can read about it starting at the third paragraph he http://www.ppinyot.com/H/s-38.htm Not documented on the web page, I later ran into "Silver Mica Disease". I took apart the IF cans and added external caps. Other than that I do not know. Good Luck, Paul P. "Radio" wrote in message ... .. I have had an S-38 on the shelf for a few years and finally got around to recapping it this weekend. All went well and it does play but not as well as I figure it should. I did find one loose wire that is attached to S1B terminal “O” and goes nowhere. There is another lead attached to that same terminal which goes to the antenna terminal lug 4. I don’t see this extra lead on the circuit diagram and it does appear to be a lead that was there when the rig was built. It look like a cream colored lead with red stripes. I wonder if anyone has any idea where this lead is supposed to go? I |
#7
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On Jun 15, 8:35*pm, "Paul P" REMOVE paul @ REMOVE ppinyot .
REMOVEcom wrote: You may already know this - C25 inject the BFO oscillations. *It is a simple wire wrapped around an detector wire. *You can see C25 in this schematic:http://www.nostalgiaair.org/PagesByM...2/M0008862.pdf I do remember finding a strange wire on the S-38 that I recently restored.. It killed band 2. *I compared the actual circuit to the schematic and put it back to the schematic. *You can read about it starting at the third paragraph hehttp://www.ppinyot.com/H/s-38.htm Not documented on the web page, I later ran into "Silver Mica Disease". *I took apart the IF cans and added external caps. Other than that I do not know. Good Luck, Paul P. "Radio" wrote in message ... . *I have had an S-38 on the shelf for a few years and finally got around to recapping it this weekend. *All went well and it does play but not as well as I figure it should. *I did find one loose wire that is attached to S1B terminal “O” and goes nowhere. *There is another lead attached to that same terminal which goes to the antenna terminal lug 4. *I don’t see this extra lead on the circuit diagram and it does appear to be a lead that was there when the rig was built. *It look like a cream colored lead with red stripes. *I wonder if anyone has any idea where this lead is supposed to go? *I Thanks for the web page Paul. The wire in the picture on that page appears to be the same one that I have been questioning. That would certainly explain why it is not connected to anything. My band number 2 is active so that would also be a good indicator. I did listen to the radio last ngiht and could receive SW from all over the world on a 4 ft piece of wire. Thanks to all who have responded to my question! This group sure is a great tool for the radio hobby! Thanks again. Do any of you have any thoughts or comments on restoration of an RME-84 receiver? That is next on my list of things to do! Karl KC9AA New London, WI |
#8
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Thanks for the web page Paul. The wire in the picture on that page
appears to be the same one that I have been questioning. That would certainly explain why it is not connected to anything. Karl, Glad to be of help. Paul P. |
#9
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On Jun 16, 11:45*am, "Paul P" REMOVE paul @ REMOVE ppinyot .
REMOVEcom wrote: Thanks for the web page Paul. *The wire in the picture on that page appears to be the same one that I have been questioning. *That would certainly explain why it is not connected to anything. * Karl, * Glad to be of help. Paul P. Crazy question re foregoing! The Hallicrafters S38 and S53 were post-war receivers; correct? So that extra wire would have nothing to do with that war time ruling that there were instructions that the short wave-bands of receivers in certain parts of North America, during WWII, be disabled to (supposedly) prevent enemy spies from receiving instructions via short- wave? Sounds like some of the same paranoia that we hear today! More personally; in Britain, I recall as a child during WWII, listening with my grandfather to propaganda broadcasts from Germany; just a short distance across the North Sea. Particularly to 'Lord Haw Haw' (William Joyce), who operated much in the manner of Tokyo Rose; trying to disseminate false information and British public dissatisfaction with Allied governments and military commanders. Didn't work btw. Some of his material was greeted with guffaws and remarks such as "That's the third time he's sunk that ship"! After the war it was ruled that he was a traitor, having held a British passport, despite claiming an Irish grandfather and he was hanged. Also recall my father sarcastically remarking "Pity they hanged him; he could have continued his career as a radio comedian"! Thanks for reading. |
#10
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This seems to be the best explanation yet of why that wire was there.
PP Crazy question re foregoing! The Hallicrafters S38 and S53 were post-war receivers; correct? So that extra wire would have nothing to do with that war time ruling that there were instructions that the short wave-bands of receivers in certain parts of North America, during WWII, be disabled to (supposedly) prevent enemy spies from receiving instructions via short- wave? Sounds like some of the same paranoia that we hear today! More personally; in Britain, I recall as a child during WWII, listening with my grandfather to propaganda broadcasts from Germany; just a short distance across the North Sea. Particularly to 'Lord Haw Haw' (William Joyce), who operated much in the manner of Tokyo Rose; trying to disseminate false information and British public dissatisfaction with Allied governments and military commanders. Didn't work btw. Some of his material was greeted with guffaws and remarks such as "That's the third time he's sunk that ship"! After the war it was ruled that he was a traitor, having held a British passport, despite claiming an Irish grandfather and he was hanged. Also recall my father sarcastically remarking "Pity they hanged him; he could have continued his career as a radio comedian"! Thanks for reading. |
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