03-08-2014, 09:08 AM
hi....just came across your post.....Not sure if you have resolved your issues with your 47 1230 or not. If you search and read my posts on the 1230 you will see that I have been working on one for the last year with many difficulties.....after much labor I discovered that many things in my radio did not match the schematic, the parts list or the testing diagrams.....some of this was explained by previous people making changes, mistakes etc....and part I think was due errors, changes between the service manual and the radio. I found this a difficult radio to work on and most who have tackled it I think agree. I did learn a lot though.
first, your am reception....I found that I get completely different reception depending on how I connect the antenna. There are three connectors as you face the back of the chassis. The white wire should be connected to the left screw This is the same screw that you would connect your signal generator to. The black or ground wire can either be connected to the second or third screw. I found that in my area the second screw works best...(I live in nyc). I think that the second screw is for local reception and the third is for distance although there is nothing in the manual that I could find.
Second, alignment.....or I should say AM alignment. I discovered the same thing that you refer to, that I had to connect the signal gernerator directly to the first and second screws of the antenna. The loop or induction testing outlined in the alignment procedures DID NOT work for me either. Once again, I am not sure exactly why. I just kept the signal generator connected directly to the antenna and completed the last part of the test.....and the am reception was much improved. I could not get the loop induction method to work for the SW or FM either and since I did not have a scope I just relied on my ears and now get good SW and FM reception as well. Maybe someone out there who is smarter then me can tell me why we could not get the radio to receive the generator signal using induction....Hope that this helps....this radio can play incredibly well when working properly. Many including myself use the RCA jack to plug an iPod into the phono section.....I have heard of different ways to make the attachment on the board but found that the simplest was is to get an RCA female to iPod STEREO adaptor from radio shack for $3, attach this adaptor to your iPod or iPhone and then run an RCA wire with two male ends from the adaptor/iPod to the RCA jack on the radio.....sounds more complicated than it is but only requires this little adaptor and an RCA cable that you have laying around your house.....hope that some of this is helpful.
first, your am reception....I found that I get completely different reception depending on how I connect the antenna. There are three connectors as you face the back of the chassis. The white wire should be connected to the left screw This is the same screw that you would connect your signal generator to. The black or ground wire can either be connected to the second or third screw. I found that in my area the second screw works best...(I live in nyc). I think that the second screw is for local reception and the third is for distance although there is nothing in the manual that I could find.
Second, alignment.....or I should say AM alignment. I discovered the same thing that you refer to, that I had to connect the signal gernerator directly to the first and second screws of the antenna. The loop or induction testing outlined in the alignment procedures DID NOT work for me either. Once again, I am not sure exactly why. I just kept the signal generator connected directly to the antenna and completed the last part of the test.....and the am reception was much improved. I could not get the loop induction method to work for the SW or FM either and since I did not have a scope I just relied on my ears and now get good SW and FM reception as well. Maybe someone out there who is smarter then me can tell me why we could not get the radio to receive the generator signal using induction....Hope that this helps....this radio can play incredibly well when working properly. Many including myself use the RCA jack to plug an iPod into the phono section.....I have heard of different ways to make the attachment on the board but found that the simplest was is to get an RCA female to iPod STEREO adaptor from radio shack for $3, attach this adaptor to your iPod or iPhone and then run an RCA wire with two male ends from the adaptor/iPod to the RCA jack on the radio.....sounds more complicated than it is but only requires this little adaptor and an RCA cable that you have laying around your house.....hope that some of this is helpful.
