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RS DX-392 BFO centering adjustment?
I bought a RatShack DX-392 shortwave set from a thrift shop for $3.
They couldn't get it to work because they didn't see the clock batteries (AA cells) in the bottom of it....(c; The radio works great and is a nice hot receiver for something without proper sideband filters in it. It's only problem is the BFO is about 3Khz off frequency, so you have to tune the receiver off frequency to get the BFO injection in the right place to receive sideband. It's VERY stable, amazingly enough, and will stay on freq for hours monitoring hams and NY Radio on 8.9 Mhz to planes over the Atlantic. Does anyone have access to the service manual Radio Shack tells me USED to exist, but is no longer available? I can't find any adjustment to center up the BFO in it but there's gotta be a way. Any help would be greatly appreciated. Even the way it is it was a helluva bargain....(c; Larry W4CSC No, no, Scotty! I said, "Beam me a wrench.", not a WENCH! Kirk Out..... |
Like the DX-390 its TC3 on the board, it not accessible.
Without a test jig the screws on the outer board must come off, the PCB flipped up just enough to access it with the set powered ON I DO NOT recommend this if your a rookie ! Center the BF at 12 O'clock and Tune to WWW and adjust TCP-3 for a zero beat. Joe "Larry W4CSC" wrote in message ... I bought a RatShack DX-392 shortwave set from a thrift shop for $3. They couldn't get it to work because they didn't see the clock batteries (AA cells) in the bottom of it....(c; The radio works great and is a nice hot receiver for something without proper sideband filters in it. It's only problem is the BFO is about 3Khz off frequency, so you have to tune the receiver off frequency to get the BFO injection in the right place to receive sideband. It's VERY stable, amazingly enough, and will stay on freq for hours monitoring hams and NY Radio on 8.9 Mhz to planes over the Atlantic. Does anyone have access to the service manual Radio Shack tells me USED to exist, but is no longer available? I can't find any adjustment to center up the BFO in it but there's gotta be a way. Any help would be greatly appreciated. Even the way it is it was a helluva bargain....(c; Larry W4CSC No, no, Scotty! I said, "Beam me a wrench.", not a WENCH! Kirk Out..... |
On Fri, 05 Mar 2004 17:44:18 GMT, "Joe"
wrote: Like the DX-390 its TC3 on the board, it not accessible. Without a test jig the screws on the outer board must come off, the PCB flipped up just enough to access it with the set powered ON I DO NOT recommend this if your a rookie ! Center the BF at 12 O'clock and Tune to WWW and adjust TCP-3 for a zero beat. Joe Thank you, Joe. I owe you one. SSB sensitivity just went up 15 db...(c; Larry W4CSC POWER is our friend! |
Thank you, too, Tracy. Wonder why, after 30 minutes of searching
through the office, my big RS store couldn't point me to this website. Now, maybe, I can figure out some of its queer timer functions and how to get the recorder recording the radio, not the microphone...(c; On Fri, 05 Mar 2004 15:21:31 -0500, Tracy Fort wrote: On Fri, 05 Mar 2004 17:27:51 GMT, (Larry W4CSC) wrote: I bought a RatShack DX-392 shortwave set from a thrift shop for $3. They couldn't get it to work because they didn't see the clock batteries (AA cells) in the bottom of it....(c; The radio works great and is a nice hot receiver for something without proper sideband filters in it. It's only problem is the BFO is about 3Khz off frequency, so you have to tune the receiver off frequency to get the BFO injection in the right place to receive sideband. It's VERY stable, amazingly enough, and will stay on freq for hours monitoring hams and NY Radio on 8.9 Mhz to planes over the Atlantic. Does anyone have access to the service manual Radio Shack tells me USED to exist, but is no longer available? I can't find any adjustment to center up the BFO in it but there's gotta be a way. Any help would be greatly appreciated. Even the way it is it was a helluva bargain....(c; Larry W4CSC No, no, Scotty! I said, "Beam me a wrench.", not a WENCH! Kirk Out..... here is a link to the operators manual...matbe it will help http://support.radioshack.com/suppor...oc62/62173.pdf Tracy Larry W4CSC POWER is our friend! |
No Problem
Yea, the early boards alignments from whoever Sangean contracted were real "El-Stinko" I also had to convert the AVC rectifier to a doubler to handle the big MW stations here in the Tri State area (overloading, brash audio), I also added a LED illumination to the display Those filters are no beauties also, I have a DX-390 aka Sangean ATS 818. Its still a bang for for the $$. I have dealt with Sangean in Ca. they are hands down the nicest people to deal with in radio since Drake n the 70's. -Joe "Larry W4CSC" wrote in message ... On Fri, 05 Mar 2004 17:44:18 GMT, "Joe" wrote: Like the DX-390 its TC3 on the board, it not accessible. Without a test jig the screws on the outer board must come off, the PCB flipped up just enough to access it with the set powered ON I DO NOT recommend this if your a rookie ! Center the BF at 12 O'clock and Tune to WWW and adjust TCP-3 for a zero beat. Joe Thank you, Joe. I owe you one. SSB sensitivity just went up 15 db...(c; Larry W4CSC POWER is our friend! |
10 cents he get the UST and local timers backwards.
:) - Joe "Larry W4CSC" wrote in message Thank you, too, Tracy. Wonder why, after 30 minutes of searching through the office, my big RS store couldn't point me to this website. Now, maybe, I can figure out some of its queer timer functions and how to get the recorder recording the radio, not the microphone...(c; On Fri, 05 Mar 2004 15:21:31 -0500, Tracy Fort wrote: On Fri, 05 Mar 2004 17:27:51 GMT, (Larry W4CSC) wrote: I bought a RatShack DX-392 shortwave set from a thrift shop for $3. They couldn't get it to work because they didn't see the clock batteries (AA cells) in the bottom of it....(c; The radio works great and is a nice hot receiver for something without proper sideband filters in it. It's only problem is the BFO is about 3Khz off frequency, so you have to tune the receiver off frequency to get the BFO injection in the right place to receive sideband. It's VERY stable, amazingly enough, and will stay on freq for hours monitoring hams and NY Radio on 8.9 Mhz to planes over the Atlantic. Does anyone have access to the service manual Radio Shack tells me USED to exist, but is no longer available? I can't find any adjustment to center up the BFO in it but there's gotta be a way. Any help would be greatly appreciated. Even the way it is it was a helluva bargain....(c; Larry W4CSC No, no, Scotty! I said, "Beam me a wrench.", not a WENCH! Kirk Out..... here is a link to the operators manual...matbe it will help http://support.radioshack.com/suppor...oc62/62173.pdf Tracy Larry W4CSC POWER is our friend! |
On Fri, 5 Mar 2004 11:27:51 -0600, Larry W4CSC wrote
(in message ): I bought a RatShack DX-392 shortwave set from a thrift shop for $3. They couldn't get it to work because they didn't see the clock batteries (AA cells) in the bottom of it....(c; The radio works great and is a nice hot receiver for something without proper sideband filters in it. It's only problem is the BFO is about 3Khz off frequency, so you have to tune the receiver off frequency to get the BFO injection in the right place to receive sideband. It's VERY stable, amazingly enough, and will stay on freq for hours monitoring hams and NY Radio on 8.9 Mhz to planes over the Atlantic. Does anyone have access to the service manual Radio Shack tells me USED to exist, but is no longer available? I can't find any adjustment to center up the BFO in it but there's gotta be a way. There are three models of the 392 and this page http://www.radioshack.com/ProdSuppor...tailIndex.asp? P=support_electronics&D=3157&T=htm will take you to the choice. This page is the dir for the earliest model: http://www.radioshack.com/ProdSuppor...tailIndex.asp? P=support_electronics&D=3157&T=htm Gray Shockley -------------------------- Entropy Maintenance Technician Tao Chemical Company -------------------------- http://www.compcomm.com/ Vicksburg, Mississippi US |
The BFO on my 392 is just a little off, so I just marked on its dial where zero
is and then offset the knob either way for SSB (or CW). SSB remained in range on the "short" side of the BFO range. I agree the receiver is stable. I used it on fax. I tried taping the fax, but there's a slight difference in motor speed between record and play, which causes thefax display to skew. I never got around to poking inside and correcting or changing one of the speeds. Those AAs below the Ds also save the memory and power the control circuits. When they're dead, nothing happens. Bill, K5BY |
I don't know why I bought it. There's $15K in Yaesu ham equipment
sitting idle on this desk...(c; Internet has been hell on ham radio operations, here, for many years. It's a nice receiver, even though RS treated it as if it were a leper when I asked for the service manual. I'll take it to sea, Wednesday, for some R&R on deck. At $3, it IS a lot of bang for the buck...(c; On Sat, 06 Mar 2004 03:28:35 GMT, "Joe" wrote: No Problem Yea, the early boards alignments from whoever Sangean contracted were real "El-Stinko" I also had to convert the AVC rectifier to a doubler to handle the big MW stations here in the Tri State area (overloading, brash audio), I also added a LED illumination to the display Those filters are no beauties also, I have a DX-390 aka Sangean ATS 818. Its still a bang for for the $$. I have dealt with Sangean in Ca. they are hands down the nicest people to deal with in radio since Drake n the 70's. -Joe Larry W4CSC POWER is our friend! |
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On Sat, 06 Mar 2004 03:34:01 GMT, "Joe"
wrote: 10 cents he get the UST and local timers backwards. :) - Joe Er, ah, send Tracy a dime.....(c; Larry Larry W4CSC POWER is our friend! |
Thanks, Gray. I batted 1000, again! This is the B, latest, model....
Isn't it silly they'd publish the parts list without publishing the schematic or service manual? I stored it anyway. When you call RS they say its obsolete. End of conversation in a throw-away Japanese economy. On Fri, 5 Mar 2004 23:04:53 -0600, Gray Shockley wrote: On Fri, 5 Mar 2004 11:27:51 -0600, Larry W4CSC wrote (in message ): I bought a RatShack DX-392 shortwave set from a thrift shop for $3. They couldn't get it to work because they didn't see the clock batteries (AA cells) in the bottom of it....(c; The radio works great and is a nice hot receiver for something without proper sideband filters in it. It's only problem is the BFO is about 3Khz off frequency, so you have to tune the receiver off frequency to get the BFO injection in the right place to receive sideband. It's VERY stable, amazingly enough, and will stay on freq for hours monitoring hams and NY Radio on 8.9 Mhz to planes over the Atlantic. Does anyone have access to the service manual Radio Shack tells me USED to exist, but is no longer available? I can't find any adjustment to center up the BFO in it but there's gotta be a way. There are three models of the 392 and this page http://www.radioshack.com/ProdSuppor...tailIndex.asp? P=support_electronics&D=3157&T=htm will take you to the choice. This page is the dir for the earliest model: http://www.radioshack.com/ProdSuppor...tailIndex.asp? P=support_electronics&D=3157&T=htm Gray Shockley -------------------------- Entropy Maintenance Technician Tao Chemical Company -------------------------- http://www.compcomm.com/ Vicksburg, Mississippi US Larry W4CSC POWER is our friend! |
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