Cobra 1000gtl RX caps

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ricky252
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Cobra 1000gtl RX caps

Post by ricky252 »

I have this cobra 1000gtl I like to use sometimes and just want to open up the RX for HiFi. Can you point me in the right direction Goldfinger please.
252 in Ga.
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Goldfinger
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Post by Goldfinger »

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ricky252
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Post by ricky252 »

Well I did not know this. I thought the board was same as 89gtl. Thanks Goldfinger, I will get in there and have a look.
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Post by Goldfinger »

Well, neither the 1000 or the 89GTL is exactly like a 29 because of the clock and other things, but in the main part of the transmitter/receiver circuits it is the same design, so should extrapolate OK for the receive upgrade.
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ricky252
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Post by ricky252 »

hmm, the layout of the main board is diff. C33 is right next to vr2 and C40 not far from that. I changed them to 2.2uf caps just to see. pulled .01uf out. Made no diff. put it back.
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ricky252
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Post by ricky252 »

252 in Ga.
ricky252
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Post by ricky252 »

If you dont mind could you take a look at the sch. in the link. I did try it like a 29, no good. I have to be spoon fed lol. Thank You
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Post by Goldfinger »

heh, my bad. The added circuitry shifted the numbers a little

Change C31 and C38 to 2.2uF
Sorry for the added work and confusion.
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ricky252
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Post by ricky252 »

Hey thats ok my man. Thank you very much. will give it a whirl in the morning.
252 in Ga.
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Post by ricky252 »

Thanks Goldfinger that did the trick. Very good lows in my speaker, better than any 29 I have done.
252 in Ga.
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