Where to Get the Pieces

     Here's a list of vendors that supply the parts used in 
the 10-GHz transverter.*** Catalogs and/or price lists are 
available from each listed supplier.

Down East Microwave, RR1 Box 2310, Troy, ME 04987, tel 
207-948-3741, fax 207-948-5157, and Steve Kostro, N2CEI, RFD 1 
Box 341A, Frenchtown, NJ 08825, tel 908-834-1304 (days) or 
908-996-3584: MMICs, MGF1302, chip capacitors, SMA connectors, 
mixer diodes (only DEM carries the HSMS 8202; both stock the 
HSMS 2822).

Mainline Electronics, PO Box 235, Leicester LE2 9SH, England: 
MGF1302, MMICs, transistors, voltage regulators.

Microwave Components of Michigan, PO Box 1697, Taylor, MI 
48180, evening tel 313-753-4581: MMICs, 15-mil 5880 board 
material, MGF1302, HSMS 2822, chip capacitors, UT-141, SMA 
connectors, feedthrough capacitors.

Nemal Electronics, 12240 NE 14 Ave, N Miami, FL 33161, tel 
305-893-3924: SMA connectors, semirigid cable.

Ocean State Electronics, PO Box 1458, Westerly, RI 02891, tel 
401-596-3080, fax 401-596-3590: LM555, 78L05, 2N3906, 2N2907A, 
ICL7660, 1/4-watt carbon-film resistors, electrolytic 
capacitors, tantalum capacitors.

SHF Microwave Parts Co, 7102 W 500 St, La Porte, IN 46350: 
HSMS 2822, MMICs. Also sells Gunn transceivers.

Small Parts, PO Box 4560, Miami Lakes, FL 33014, tel 305-557-
8222: brass sheet stock, stainless-steel screws, #2-56 taps, 
many other items of interest to microwave-equipment builders.

RF Parts, 1320 Grand Ave, San Marcos, CA 92069, tel 619-744-
0700, fax 619-744-1943: MGF1302.

***This is not intended to be a complete list of dealers that 
carry these products.
[end of sidebar 2]
10-GHz Transverter Performance***

Transmit Converter

144-MHz Drive   10-GHz Output*+*
   (dBm)           (dBm)
   -10.0             3.8
    -3.0             8.5
     0.0            10.3
     1.0            10.8
     3.0            11.6
     5.0            12.2
    10.0            12.8

 
Power Output versus Supply Voltage*+*

(Drive signal: -0.8 dBm at 144.06 MHz)

Supply     Output Power
 (V)         (dBm)

10.34         8.5
10.51        10.0
10.75        10.0
12.34        10.0
14.02        10.0


Receive Converter

 IF      Gain    Noise Figure
(MHz)    (dB)       (dB)
 144     8.82       2.73
 146     8.79       2.70
 148     8.79       2.71

Noise Figure and Insertion Gain versus Supply Voltage

(IF = 144 MHz)

Supply  Gain   Noise Figure
 (V)    (dB)      (dB)
10.3    6.59      3.03
10.7    8.81      2.92
10.9    8.64      2.89
11.3    8.59      2.79
12.4    8.68      2.75
13.4    8.70      2.74
13.5    8.73      2.76
14.9    8.75      2.74


***The data in this table comes from the most recently 
completed prototype, which consists of the modules described 
in Part 1 and Part 2 of this article.

*+*Power output was measured with an uncalibrated HP 
453B/8481A.