Philips India used this IC in radios made in India during 1990s. The example shown here is Philettina 1989-90 model. The same thing happened with all 6 volt radios made by Philips during 1989-1999. After that Philips used Chinese ICs and leased out its brand to other companies (since 2009). I must acknowledge that I have edited the video of this radio from another source. I had tested this radio both at the store and elsewhere during the 90s (found motorboating sound in both cases but at different areas).
@@Radiotreehut Ha, ha! I am talking of AM. TEA IC wasn't bad in FM. And for that matter so far no radio has been found with bad FM reception. Even a Rs 400/- radio with Chinese IC is good in FM. IC technology suits FM not AM, unless more money is put into it.
Sir this motorboating is throigout the band or at some particular frequencies only...it may be die to faulty rf shunt capacitor rather than poor ic batch
@@Radiotreehut That is possible. But I had tested all IC radios of Philips during 1990s at different stores as a prospective consumer when I was young. Besides, I had bought Philips Philetta 1990 model and faced this problem despite all effort, it remained. One of my friends had bought a Philettina radio (this IC model) and also had this problem. While consumers in Europe returned their radios to Philips company in India the consumers took it for granted. And dealers made people fool by telling, look it is happening due to electrical disturbances. But I found it continued even without electrical disturbances and without adaptor use. Why didn't it happen in Philps radios made before 1989? Because, then transistors were used. There was no motorboating in transistorised radios unless there were some fault in condensers or electrical disturbances. And why did Philips stop its own IC used other ICs if it wasn't their fault?
@@pradeepkumarpanda7626 nice finding...it's interesting that you was so much into radio circuits..I am not as experienced as you but learning by experiments from people like you..I compared ic sensitivity from their datasheet and the tea5570 was high on specs...I have a communication tester and will try to check their sensitivity on that but need quite free time for that...
@@Radiotreehut Mere sensitivity is not everything. What matters is clarity. Sensitivity with noise is not desirable. I don't know what is your age, had you grown up listening to even a standard (not necessarily high end) transistor radio you could have easily found the deficiency of an IC based radio of more than 3v. Please buy /collect a transistor radio in good condition and test it with an IC set of 6v/4.5 v in MW/SW you will get the answer. But both sets must be tested using cells, not adaptor. But the tragedy is that transistor radios were available 38- 40 years ago from 1955 to 1988 in India. Only mid-80s radios might be in good working condition.
@@pradeepkumarpanda7626 I have more than 300 radios...more than 50 are all transistor radio..some working some non working... But one you have grundig satellite, Panasonic rf 2200 , sony icf 6800 , these radio reached that level with the help of ic...
@@RadiotreehutOh, I recall, you are a radio collector. So you admit that transistor radios are better and only good quality radios having IC are of same standard. Yes, Panasonic sets are known for their sharp and clear sound. But distortion is high in IC based Panasonic radios in the background. Sony IC is the best IC. IC radios don't cause distortion if 3v, but not beyond 3v, especially 6v.
Philips India used this IC in radios made in India during 1990s. The example shown here is Philettina 1989-90 model. The same thing happened with all 6 volt radios made by Philips during 1989-1999. After that Philips used Chinese ICs and leased out its brand to other companies (since 2009).
I must acknowledge that I have edited the video of this radio from another source. I had tested this radio both at the store and elsewhere during the 90s (found motorboating sound in both cases but at different areas).
Nxp is at tio ranking now with its tef66xx and later series specially in fm
@@Radiotreehut Ha, ha! I am talking of AM. TEA IC wasn't bad in FM. And for that matter so far no radio has been found with bad FM reception. Even a Rs 400/- radio with Chinese IC is good in FM. IC technology suits FM not AM, unless more money is put into it.
Sir this motorboating is throigout the band or at some particular frequencies only...it may be die to faulty rf shunt capacitor rather than poor ic batch
@@Radiotreehut That is possible. But I had tested all IC radios of Philips during 1990s at different stores as a prospective consumer when I was young. Besides, I had bought Philips Philetta 1990 model and faced this problem despite all effort, it remained. One of my friends had bought a Philettina radio (this IC model) and also had this problem. While consumers in Europe returned their radios to Philips company in India the consumers took it for granted. And dealers made people fool by telling, look it is happening due to electrical disturbances. But I found it continued even without electrical disturbances and without adaptor use. Why didn't it happen in Philps radios made before 1989? Because, then transistors were used. There was no motorboating in transistorised radios unless there were some fault in condensers or electrical disturbances.
And why did Philips stop its own IC used other ICs if it wasn't their fault?
@@pradeepkumarpanda7626 nice finding...it's interesting that you was so much into radio circuits..I am not as experienced as you but learning by experiments from people like you..I compared ic sensitivity from their datasheet and the tea5570 was high on specs...I have a communication tester and will try to check their sensitivity on that but need quite free time for that...
@@Radiotreehut Mere sensitivity is not everything. What matters is clarity. Sensitivity with noise is not desirable. I don't know what is your age, had you grown up listening to even a standard (not necessarily high end) transistor radio you could have easily found the deficiency of an IC based radio of more than 3v.
Please buy /collect a transistor radio in good condition and test it with an IC set of 6v/4.5 v in MW/SW you will get the answer. But both sets must be tested using cells, not adaptor. But the tragedy is that transistor radios were available 38- 40 years ago from 1955 to 1988 in India. Only mid-80s radios might be in good working condition.
@@pradeepkumarpanda7626 I have more than 300 radios...more than 50 are all transistor radio..some working some non working... But one you have grundig satellite, Panasonic rf 2200 , sony icf 6800 , these radio reached that level with the help of ic...
@@RadiotreehutOh, I recall, you are a radio collector. So you admit that transistor radios are better and only good quality radios having IC are of same standard. Yes, Panasonic sets are known for their sharp and clear sound. But distortion is high in IC based Panasonic radios in the background. Sony IC is the best IC. IC radios don't cause distortion if 3v, but not beyond 3v, especially 6v.