UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 0.1-2000 MHz Wide Band Amplifier ~£4

G0HZU_JMR · 23rd Oct 2018, 5:36 pm

I also did some digging on our old parts database at work to look for examples of the old 'Magic Modamps' and I found two of them. The one closest to the spec of the ebay MMIC is the Avantek INA-02170. This is a really old part (nearly 30 years old?) but the datasheet plot for gain and noise figure vs frequency shown on the ebay auction looks like the Avantek plot of this old INA-02170. So my guess is that the MMIC used in this board is closely related to the plastic package version of the INA-02170 and this would be the INA-02186.

Ebay seems to have loads of new INA-02186 MMICs for sale and some of them have the same 'N02' logo stamped on them so maybe these are Chinese clones of this old Avantek/HP part. I think the original INA-02170 was quite expensive partly because it is in the posh '70' package and it probably cost about £25 about 30 years ago.

23rd Oct 2018, 5:36 pm	#25
G0HZU_JMR Dekatron Join Date: Sep 2010 Location: Cheltenham, Gloucestershire, UK. Posts: 3,077	Re: 0.1-2000 MHz Wide Band Amplifier ~£4 I also did some digging on our old parts database at work to look for examples of the old 'Magic Modamps' and I found two of them. The one closest to the spec of the ebay MMIC is the Avantek INA-02170. This is a really old part (nearly 30 years old?) but the datasheet plot for gain and noise figure vs frequency shown on the ebay auction looks like the Avantek plot of this old INA-02170. So my guess is that the MMIC used in this board is closely related to the plastic package version of the INA-02170 and this would be the INA-02186. Ebay seems to have loads of new INA-02186 MMICs for sale and some of them have the same 'N02' logo stamped on them so maybe these are Chinese clones of this old Avantek/HP part. I think the original INA-02170 was quite expensive partly because it is in the posh '70' package and it probably cost about £25 about 30 years ago. __________________ Regards, Jeremy G0HZU Last edited by G0HZU_JMR; 23rd Oct 2018 at 5:44 pm.