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Thread Tools | Display Modes |
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#1
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Does Akai Mod Work For Static Problem?
Anyone have success in eliminating the static/crackling problem in
Akai/Roberts decks by using the Akai mod? I know there is a ton of archive info regarding this issue, and one theory is to add 1 uF cap in parallel to the sensing poles by the recording head. I own a Roberts 808D that crackles in the right channel on most tapes after it auto changes tracks. When the tape is first inserted and tracks are manually changed the problem is not apparent. Only when the player auto changes does the static appear. I also read that the problem could be attributed to a loose ground wire connected to the screw that holds the head in place. By tightening the screw the ground wire will then make proper contact and eliminate the static. Do either of these procedures really correct the problem? I'd use this Roberts deck alot more if I could eliminate the crackling! BTW....this deck has a cool after mod, the previous owner had a pause mode added on using a toggle switch and an extra light that comes on when engaged! I would really like to get this deck to play the way it should. The sound is very nice otherwise. |
#2
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Does Akai Mod Work For Static Problem?
I performed a mod on my Roberts 808D and Akai 81D- this mod will make the program track switch work reliably every time. It's a proprietary mod and procedure I developed myself, after giving it much thought- so I can't share it at this time. I will upgrade any Akai deck for $20 plus shipping both ways, if you want this done. The graphite problem, will also trick the auto stop circuit in the Pioneer HR-99/100 decks- causing them to auto stop in the middle of a program, instead of at the end. The Pioneers will also crackle with an old tape with playside loose graphite- but not as bad. Static problem- you really can't eliminate that entirely. It is caused by loose graphite hitting the tape head, on a high-end deck that was designed to give an upper limit of 15khz-18khz high end response. The tape deck circuit responds to little pieces of graphite, as if they are part of the music recorded as static, if you get my drift. The static will reoccur exactly the same way, at the same part of the tape- just like music. If you listen to the tapes that have static, you'll find that it makes the static in the same place, and the same type of static- i.e. it's on the tape- i.e. it's loose graphite on the FRONT play side of the tape, hitting the head. This same loose graphite, is slightly conductive and is what drains the Akai program switch capacitor prematurely, causing the 80-81-82 decks not to switch tracks. A close inspection will reveal, the 82 deck system was modified further to try to solve this problem, but even the 82 may not switch tracks on an old tape, with lots of graphite transferred to the front of the tape. The key to getting rid of the static, is clean the FRONT SIDE of the tape thoroughly. One way is to de-spool all the tape, and wipe both sides with alcohol and a rag. This not only cleans the front play side, but also the back side- and removes LOOSE graphite, that is no longer adhered to the tape. Another mod is, put new pads in the tape, that are foam with no slick surface on them (cut your own, or buy mine on Ebay, $10 per 100, plus $5 shipping)- the foam pads will act as scrubbers and clean off the loose graphite from the back of the tape. Graphite that is properly adhered, will not, and should not, come off the back of the tape in the first place. If you put foam pads in without slick surface, they will actually "clean" the tape, the more you play it- a transfer will occur, where loose graphite that is on the front playside of the tape, will return/transfer to the backside of the tape, then be picked up by the foam pads and removed. Radio Shack had a similar machine that was made to clean tapes, but no one was ever sharp enough to realize how it worked- and used it on new tapes that didn't need it. If you find one of those RS cleaning machines, playing a crackling tape in it long enough, will get rid of the crackling on the tape. Crappy low-end decks with limited 12khz-14khz top end, won't crackle- because of their limited upper bandwidth, the head cannot reproduce a crackle, from the loose graphite- so they basically play muffled even when working correctly- and you don't here the crackle. get it ? "still_trackin" wrote in message ups.com... Anyone have success in eliminating the static/crackling problem in Akai/Roberts decks by using the Akai mod? I know there is a ton of archive info regarding this issue, and one theory is to add 1 uF cap in parallel to the sensing poles by the recording head. I own a Roberts 808D that crackles in the right channel on most tapes after it auto changes tracks. When the tape is first inserted and tracks are manually changed the problem is not apparent. Only when the player auto changes does the static appear. I also read that the problem could be attributed to a loose ground wire connected to the screw that holds the head in place. By tightening the screw the ground wire will then make proper contact and eliminate the static. Do either of these procedures really correct the problem? I'd use this Roberts deck alot more if I could eliminate the crackling! BTW....this deck has a cool after mod, the previous owner had a pause mode added on using a toggle switch and an extra light that comes on when engaged! I would really like to get this deck to play the way it should. The sound is very nice otherwise. |
#3
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Does Akai Mod Work For Static Problem?
On Fri, 14 Sep 2007 18:00:15 -0400, "DOUCHE-boob's futile system"
wrote: I performed a mod on my Roberts 808D and Akai 81D- this mod will make the program track switch work reliably every time. It's a proprietary mod and procedure I developed myself, after giving it much thought- so I can't share it at this time. I will upgrade any Akai deck for $20 plus shipping both ways, if you want this done. snip Bull**** and another Charlie Nudo con job. The mod is readily available on 8tradkheaven. Don't ask Nudo for any info about it at all. He doesn't even understand how it works! |
#4
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Does Akai Mod Work For Static Problem?
On Sep 14, 7:03 pm, DeserTBoB wrote:
On Fri, 14 Sep 2007 18:00:15 -0400, "DOUCHE-boob's futile system" wrote: I performed a mod on my Roberts 808D and Akai 81D- this mod will make the program track switch work reliably every time. It's a proprietary mod and procedure I developed myself, after giving it much thought- so I can't share it at this time. I will upgrade any Akai deck for $20 plus shipping both ways, if you want this done. snip Bull**** and another Charlie Nudo con job. The mod is readily available on 8tradkheaven. Don't ask Nudo for any info about it at all. He doesn't even understand how it works! Looks like another job for my tech buddy to look into. I'll have him check to see if the head shell is properly grounded and if the capacitor in the signal path is failing. Hopefully he can determine the problem. I'm currently using my working GXR-82D with no problems and excellent sound quality. No static and always changes tracks. Head alignment must be accurate....can't hear any track bleeding. Going thru my deck collection has been an eye opener. I've sorted out the good performers from the ones that need some work/repair. Thanks again for the tech tips! |
#5
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Does Akai Mod Work For Static Problem?
I find it hard to believe, that an 82D has no crossbleed- the glass head in
those decks, was notorious for loss-bass region crossbleed between tracks but perhaps you got a good one most of the ferrite glass 8-track heads from Akai, had defective masking on the head- which allowed bass from adjacent tracks, to bleed into the ones currently playing my 82D has that trait "still_trackin" wrote in message ups.com... On Sep 14, 7:03 pm, DeserTBoB wrote: On Fri, 14 Sep 2007 18:00:15 -0400, "DOUCHE-boob's futile system" wrote: I performed a mod on my Roberts 808D and Akai 81D- this mod will make the program track switch work reliably every time. It's a proprietary mod and procedure I developed myself, after giving it much thought- so I can't share it at this time. I will upgrade any Akai deck for $20 plus shipping both ways, if you want this done. snip Bull**** and another Charlie Nudo con job. The mod is readily available on 8tradkheaven. Don't ask Nudo for any info about it at all. He doesn't even understand how it works! Looks like another job for my tech buddy to look into. I'll have him check to see if the head shell is properly grounded and if the capacitor in the signal path is failing. Hopefully he can determine the problem. I'm currently using my working GXR-82D with no problems and excellent sound quality. No static and always changes tracks. Head alignment must be accurate....can't hear any track bleeding. Going thru my deck collection has been an eye opener. I've sorted out the good performers from the ones that need some work/repair. Thanks again for the tech tips! |
#6
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Does Akai Mod Work For Static Problem?
On Sep 15, 8:41 am, "DOUCHE-boob's futile system"
wrote: I find it hard to believe, that an 82D has no crossbleed- the glass head in those decks, was notorious for loss-bass region crossbleed between tracks but perhaps you got a good one most of the ferrite glass 8-track heads from Akai, had defective masking on the head- which allowed bass from adjacent tracks, to bleed into the ones currently playing my 82D has that trait "still_trackin" wrote in message ups.com... On Sep 14, 7:03 pm, DeserTBoB wrote: On Fri, 14 Sep 2007 18:00:15 -0400, "DOUCHE-boob's futile system" wrote: I performed a mod on my Roberts 808D and Akai 81D- this mod will make the program track switch work reliably every time. It's a proprietary mod and procedure I developed myself, after giving it much thought- so I can't share it at this time. I will upgrade any Akai deck for $20 plus shipping both ways, if you want this done. snip Bull**** and another Charlie Nudo con job. The mod is readily available on 8tradkheaven. Don't ask Nudo for any info about it at all. He doesn't even understand how it works! Looks like another job for my tech buddy to look into. I'll have him check to see if the head shell is properly grounded and if the capacitor in the signal path is failing. Hopefully he can determine the problem. I'm currently using my working GXR-82D with no problems and excellent sound quality. No static and always changes tracks. Head alignment must be accurate....can't hear any track bleeding. Going thru my deck collection has been an eye opener. I've sorted out the good performers from the ones that need some work/repair. Thanks again for the tech tips!- Hide quoted text - - Show quoted text - Yeah it must be a good one. I haven't tried listening with headphones, but I really don't hear anything in between tracks during normal playback at 55db-65db. I guess if I got real critical I might notice a very slight amount (with headphones) but not enough to be distracting from normal listening sessions. Out of all my decks I'd say the 82D is the most musical sounding along with the Telex changer. It seems to squeeze out more information from the recordings than other decks. |
#7
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Does Akai Mod Work For Static Problem?
On Sat, 15 Sep 2007 09:41:04 -0400, "DOUCHE-boob's futile system"
wrote: I find it hard to believe, that an 82D has no crossbleed- the glass head in those decks, was notorious for loss-bass region crossbleed snip Oh look...Noodles just invented a new term for a phenomenon that doesn't exist. Ignore Charlie Nudo...he's a complete moron. most of the ferrite glass 8-track heads from Akai, had defective masking on the head- which allowed bass from adjacent tracks, to bleed into the ones currently playing,snip That's not a "defective head," moron...that's a problem endemic with having such narrow tracks all crammed together on narrow tape. I'm not going to tell you WHY this happens...because you obviously do not know...or what it's called. I rather enjoy watching you make a complete ass out of yourself. |
#8
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Does Akai Mod Work For Static Problem?
Bull**** and another Charlie Nudo con job. The mod is readily
available on 8tradkheaven. Don't ask Nudo for any info about it at all. He doesn't even understand how it works! Well maybe, but he did give it much thought. |
#9
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Does Akai Mod Work For Static Problem?
On Tue, 18 Sep 2007 00:30:52 GMT, "William W Western"
wrote: Bull**** and another Charlie Nudo con job. The mod is readily available on 8tradkheaven. Don't ask Nudo for any info about it at all. He doesn't even understand how it works! Well maybe, but he did give it much thought. snip He tried to think, but nothin' happens! |
#10
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Does Akai Mod Work For Static Problem?
now now, WWW- you don't here me needling you about your diet, do you ?
the wrong thing to do on the Akai decks, is put anothre cap or resistor in that circuit- it won't work the circuit has to be modified and re-routed, which requires a few things unsoldered, then resoldered in other places then it works like a champ the mod requires a different approach for each deck as well ! The 80-81-82 each have slightly different circuits ! the cap fired track switching system, as it comes OEM on the Akai 80-81-82 and Roberts 808D, will never work reliably with old tapes- the graphite conducts in minute amounts, enough to trick the circuit, and prematurely drain the cap |
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