Wednesday, June 1, 2011

[HamBrewers] RE: 2M thoughts

 

Dear friends and OM,
 
Thank you for the reply's
 
as per suggestion from RAJ we will go for TDA2822  as final audio output stage.
 
MC3357, MC3359 ......... and going
 
MC3362 is Discontinued/Obsolete not be used for regular project.
 
as per suggestion from Rahul VU3WJM we will go for MC13135  as RX stage.
 
I prefer this chip bacause " Complete Dual Conversion FM Receiver – Antenna to Audio Output"
 
A very simple circuit.
 
for front end stage I prefer dual gate mosfet BF998 (the only drawback with this device is SMD package to assemble)
 
although Low noise E-PHEMT,GaAsFET can be Used, considering cost and static handling we will go for BF998
 
plus

Noise figure f = 200 MHz ------ 0.6dB

                    f = 800 MHz ------1dB
 

This transistors are protected against excessive input voltage surges by integrated back-to-back diodes between gates and source.

 

A good choice.

 

73,

N.Ganesan

 

 
THANK YOU FOR THE REPLY FROM  Kumar Gautam,Paddy,ZAP,Rahul Srivastava.

 
NOTE: SUGGESTIONS,COMMENTS,FEEDBACKS ARE WELCOME TO KEEP THIS GROUP ACTIVE .
 


 

 

 

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