[ForSale-Swap] FS: 80 and 50 Watt RF Power Semi-kits

[Topossibilities]

80 Watt RF Power Amplifier Semi kit

This semi-kit includes a NTE335 (cross to Motorola MRF454),  NPN RF 
power transistor, specified for 2 - 30MHz, 12.5 volt operation at 80W 
output, with a minimum power gain of 12dB (@ 30MHz).

The kit includes a large heat sink (5-1/4" W x 5-3/4" L x 1" H), (4) 
1-1/8" L x 1/2" o.d. ferrite sleeves,  (4) 7/16" x 3/8" o.d. ferrite 
sleeves and (4) large 5/16" x 5/16" o.d. ferrite beads.

The ferrite sleeves will be cemented together to form binocular cores 
for the input and output impedance matching transformers. Each 
transformer primary is made by 1 turn copper braid (removed from the 
supplied RG58 and RG8X mini coax), through which  turns of 24 or 20 
gauge Teflon insulated wire (also supplied) are threaded for the 
secondary winding.

The large ferrite beads, placed over a length of wire between the cold 
end and of output transformer and supply voltage,  form a  RFC 
decoupling choke along with associated decoupling of capacitors, A more 
than you need set of disc ceramic, tantalum and electrolytic capacitors, 
from .001 - 100 uF are included). Also included are some low value (10 - 
22 ohms) 1 watt resistors that could be used to de-Q the input 
transformer at the transistor's base.

Basically, the above components will make a simple 2 - 30MHz, 80W class 
C amplifier.

Price $30 + shipping


50 Watt RF Power Amplifier Semi kit

This semi-kit includes a NTE333 (cross to Motorola MRF450),  NPN RF 
power transistor, specified for 2 - 30MHz, 12.5 volt operation at 50W 
output, with a minimum power gain of 13dB (@ 30MHz).

The kit includes a 4-1/2" W x 2-3/8" L x 7/8" H heat sink,  1-1/8" L x 
1-1/8" W x 9/16 H", 1" L x 3/4" W x 5/16 " H ferrite binocular cores and 
(4) large 5/16" x 5/16" o.d. ferrite beads.

The  binocular cores are used to make the input and output impedance 
matching transformers. Each transformer primary is made by 1 turn copper 
braid (removed from the supplied RG58 and RG8X mini coax), through 
which  turns of 24 or 20 gauge Teflon insulated wire (also supplied) are 
threaded for the secondary winding.

The large ferrite beads, placed over a length of wire between the cold 
end and of output transformer and supply voltage,  form a  RFC 
decoupling choke along with associated decoupling of capacitors, A more 
than you need set of disc ceramic, tantalum and electrolytic capacitors, 
from .001 - 100 uF are included). Also included are some low value (10 - 
22 ohms) 1 watt resistors that could be used to de-Q the input 
transformer at the transistor's base.

Basically, the above components will make a simple 2 - 30MHz, 50W class 
C amplifier.

Price $25 + shipping

Contact: W1AAZ at verizon.net