ITT Mackay MSR 8050

 

ITT Mackay MSR 8050

FaceItt8050[1]

HF Transceiver 1.5-30 MHz USB,LSB,AM,CW,FSK.

Found at American Milspec. http://www.american-milspec.com/

And Scott gives always reliable and good service.

FrontMSR8050[1]

The documentation on the link left is from the MSR 8050 A. the A type is a bit different and have some more options like low power and rf gain.

Therefore the front and the software are different also the control board, see pictures.

front8050A[1]

The MSR 8050 A.

To expand some options, I,ve made some modifications.

These mods are not very difficult, the radio is prepared.

First my cw filter extension.

In the A type it is an optionboard you never will find.

So we make it homebrew.

Ordered some xtals by KENT Electronics for 68 Eurocent/p.

http://www.kent-electronics.nl/

Add cw filter mod.

Homebrew CW filter 2 pole.

The IF is 5 MHz and with the injection CW tone from 1 KHz in the LSB spectrum,

(is after mixer USB) need the centerfrequence to be 4999 KHz.

2p5m[1]

2pspec[1]

Not good enough.

Then make a 4 pole.

4p5m[1]

4pspec[1]

Much better.

Bandwidth abt. 500 Hz.

Did not use the optional slot but extended the  IF filterboard 1A15.

4pInbouw[1]

Inside view.

mod1A15[1]

I love CW so this is a real improvement.

Add RF-gain mod.

RFgainDetail[1] RFgainDetail2[1]

    In the MSR 8050 A, the RF-gain is standard.              In my MSR 8050 not.

RFgainDetail3[1]

Lucky to have the on/off switch available, not in use normally.

Need an extra relay for switching between squelch and rf gain.

modrf[1]

Another future modification is to use the powerlevel buttons on the front to select 10-50-100 Watt.

To come soon.

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