Friends , Romanos,? ?Gentlemens? ---? lend? me one buck I can do it for you because that's the Ebay price for the Tda7052AT?
BUT it , the design,? works ONLY with the AT variant ,? not the bare 7052 because the latter has no mute input.?
Here's the cct that the? MST 2 from Australia used to? use - a fine cct but Ozqrp shut down when the owner , Leon , retired.
Note that the? LM08 psu is critical? . This device will NOT withstand 12V.? ?the Audio? is 500% better than the crap you will get out of an LM386 cct
no wining noises , no biasing in favour of the? HF elements of the AF band because of capacitive coupling, because there ain't any.?
Note how there is? provision for Tx on muting.? this damned cct has everything.
Fly in ointment - the chip is obsolescent.? BUT it rides at night on Ebay and varous SE asian sources . Futurlec.com does not list it but often he can get not too hard parts if you pester him.? Don't buy? one unless they are rationed get two or three.? Note that i adding AGC to an existing say LM386 cct you may have to just abandond what is there and make up a replacement amp on a piece of veroboard.? Don't forget the support holes.
TE. Fidler
Timothy Fidler