Pr100 y1 vhf low noise preamp kit ramsey electronics model no. Pr100 • extensive filtering for low noise operation, 1db noise figure! • three section tuned circuit and double helical filter • centered on 145 mhz and is 2.8 mhz wide • 16db gain • perfect match for any vhf receiver • powered through a...
Pr100 y 2 ramsey transmitter kits • fm100b professional fm stereo transmitter • fm25b sythesized stereo fm transmitter • mr6 model rocket tracking transmitter • tv6 television transmitter ramsey receiver kits • fr1 fm broadcast receiver • ar1 aircraft band receiver • sr2 shortwave receiver • sc1 sho...
Pr100 y3 vhf low noise preamp kit ramsey publication no. Mpr100 manual price only: $5.00 table of contents introduction to the pr100 ............................. 4 how it works ................................................. 4 schematic ..................................................... 5 part...
Pr100 y 4 introduction to the pr100 this amplifier is a truly necessary piece of equipment for your 2 meter receive applications. With 16db of gain, you mount this up on your mast on the antenna to boost those weak signals to a receivable level. This results in clear, unbroken reception, and a more ...
Pr100 y5 the rf passes through two more tank circuits consisting of l4 and c9 in the second, and c12 and l5 in the third. Every time the rf goes through an additional tank circuit, the bandpass bandwidth of the rf is narrower. The narrower the bandwidth is before the active component of q1, the bett...
Pr100 y 6 parts layout diagram parts list capacitors 2 2.2pf ceramic capacitors (marked 2.2) (c4, c5) 1 10pf ceramic capacitor (marked 10) (c7) 3 8.2pf ceramic capacitors (marked 8.2) (c8, c9, c10) 1 22pf ceramic capacitor (marked 22) (c6) 1 100pf ceramic capacitor (marked 100, or 101) (c2) 1 .001uf...
Pr100 y7 ramsey "learn-as-you-build assembly strategy" we'll start building on the left side and work our way across, installing the lower components up to the taller sized components. This will make our placing and soldering of components easy. Be sure to read through all of the steps, and check th...
Pr100 y 8 assembly instructions: 1. Orient the pc board as in the parts layout diagram. We will start with the left hand side of the board, then go to the right. 2. Install c6, the 22pf ceramic capacitor (marked 22). 3. Install c8, a 8.2pf ceramic capacitor (marked 8.2). 4. Install c4, a 2.2pf ceram...
Pr100 y9 18. Install c1, a .01uf ceramic capacitor (marked 103, .01, or 10n). 19. Install l2, another 2.2uh inductor (green body, red-red-gold stripes). 20. Install r3, a 18 ohm resistor (brown-grey-black). 21. Install c3, a .001uf capacitor (marked 102, or .001). 22. Install r5, a 300 ohm resistor ...
Pr100 y 10 alignment: alignment is fairly simple if you follow these guidelines. The first step is to back all of the lugs out of l3, l4, and l5 until they reach the top of the cans. Fl1 should be ok, and won’t need any adjusting. 1. Screw l3 in 8 turns. 2. Screw l4 in 8 turns. 3. Screw l5 in 8 turn...
Pr100 y11 preamp installation this part of the manual assumes that you have a receiver or transceiver (if using a transceiver a tr switch is needed, like our rfs-1). This preamp operates off a 12 volt dc supply which is connected to a 2.2 µh inductor then to the center of the antenna cable near your...
Pr100 y 12 the pr100 hookup is simple if you are using coax cable such as rg-58 or better 50 ohm cable. Just run a piece from the jack marked rcvr (j3) on the pr100 to the .01µf capacitor just before the radio. Then a short piece is needed to go from the capacitor to the radio. Finally, you need to ...
Pr100 y13 troubleshooting guide: problem: when i insert this in line, i don’t observe any gain in reception. Solution: there are several causes to the problem, but the major one is that the preamp has been assembled incorrectly. Check q1 for correct installation, then check j3 for 12vdc. If those ch...
Pr100 y 14 the ramsey kit warranty please read carefully before calling or writing in about your kit. Most problems can be solved without contacting the factory. Notice that this is not a "fine print" warranty. We want you to understand your rights and ours too! All ramsey kits will work if assemble...
Pr100 y15 4. Be accompanied by the proper repair fee. No repair will be undertaken until we have received the minimum repair fee (1/2 hour labor) of $25.00, or authorization to charge it to your credit card account. 5. Include a description of the problem and legible return address. Do not send a se...
Pr100 y 16 vhf low noise preamplifier quick reference page guide how it works ....................................... 4 schematic ............................................ 5 parts layout ........................................ 6 strategy ............................................... 7 assembly...
