Hr30 • 1 30 meter (10 mhz) all mode receiver kit ramsey electronics model no. Hr30 here’s the ideal mini-receiver for catching all the busy action on 30 meters from your office, home or on trips! Small in size but big in features: • easily tunes ssb, cw, rtty and am • smooth varactor tuning of any d...
Hr30 • 2 ramsey transmitter kits • fm100b professional fm stereo transmitter • fm25b synthesized stereo transmitter • am1, am25 am transmitters • tv6 television transmitter ramsey receiver kits • fr1 fm broadcast receiver • ar1 aircraft band receiver • sr2 shortwave receiver • aa7 active antenna • s...
Hr30 • 3 hr30 amateur receiver kit ramsey publication no. Mhr30 price $5.00 table of contents introduction to the hr30 ................ 4 about direct conversion ................ 5 circuit description .......................... 6 parts list ......................................... 7 schematic diagr...
Hr30 • 4 introduction: our hr40 and hr80 models are thought of as “best for beginners” because hams with a novice or technician license can operate cw in the 80 and 40 meter bands. If you like if you like plenty of action and dx (long distance) communications, the 30 meter ham band is the place to b...
Hr30 • 5 “communications receiver” can be . That’s right- there is a big difference between the ramsey hr30 and other simple short wave radio circuits we can try to build. Yet it is very easy to build. Our hr-series are by far the easiest to build of all the ramsey kit receivers and therefore very n...
Hr30 • 6 advantages of any direct conversion receiver include: • it is simple, and therefore economical and easy to build • it is quite sensitive even with a simple antenna • its tuning oscillator could even be set up to serve directly as a transmitter vfo in a simple transceiver setup. A common pro...
Hr30 • 7 parts supplied with the hr30 kit: capacitors: ❒ 2 47pf disc capacitor [marked 150 or 151] (c4, optional c14) ❒ 1 .001µf disc capacitor [marked 102, .001 or 10nf] (c3) ❒ 2 75pf disc capacitor [c1,c2] (marked 75 or 75k) ❒ 3 .01µf disc capacitor [marked 103 , .01 or 1nf] (c5,c6,c7) ❒ 2 4.7 to ...
Hr30 • 8 "learn-as-you-build" receiver assembly strategy: to help you learn just what exactly is going on we'll discuss the purpose of most of the components or groups of components as we go along. Since we are trying to keep assembly of the board simple, we will not be able to fully describe each i...
Hr30 • 9.
Hr30 • 10 hr30 parts layout diagram.
Hr30 • 11 receiver assembly: ❒ 1. Install the rca antenna jack, j1. Solder all four points. ❒ 2. Install c5, a .01µf ceramic disc capacitor (marked 103 or .01 or 10nf). For signal coupling. This capacitor brings the signal up to the front of the pc board. Notice the long pc trace from j1 through c5 ...
Hr30 • 12 capacitor is a first step in setting up the resonant frequency of the sa602’s internal oscillator, using the resonant lc circuit to be created along with c1, c3 and l1. ❒ 12. Install c1, 75pf disc capacitor (marked 75 or 75k). ❒ 13. Install c3, .001µf ceramic disc capacitor (marked 102 or ...
Hr30 • 13 polarity. ❒ 26. Install r6, 10k ohm resistor (brown-black-orange). ❒ 27.Install u2, the lm386 audio amplifier ic chip. Just like the sa602, you must correctly position the notched or banded end. ❒ 28. Install c12, 100-220µf electrolytic capacitor; observe polarity. This capacitor couples t...
Hr30 • 14 initial testing of your hr30: you’re now ready to power up and test your hr30, but before you begin take some time to sweep off your bench of any loose component leads or solder splashes. A clean work area not only makes testing less frustrating but also less prone to problems. Required fo...
Hr30 • 15 these simple initial checks verify that your receiver is operating well enough to proceed to the next section, alignment. Alignment: turn on whatever reference signal source you plan to use. This can be a regular transceiver keying a few milliwatts into a dummy load, a crystal oscillator o...
Hr30 • 16 alignment hint for all direct conversion receivers: you will clearly hear the oscillator of your kit - very close to its receiving frequency, if you tune around for it on any shortwave radio covering the same frequency range. Even if your shortwave set does not have a bfo (beat frequency o...
Hr30 • 17 • on the air trans-receiving let’s assume that you plan to use this receiver together with a ramsey qrp transmitter, which provides an rf protected receiver antenna jack. While the receiver will be protected from rf damage from the transmitter, do not expect to monitor your own signal on t...
Hr30 • 18 • adding an led power on indicator for many people, a pilot lamp to indicate “power on” is more than a nice touch. They expect it and depend on it , reminding us that “real radios glow in the dark!” adding a simple led power-on indicator to your ramsey hr30 is easy. All you need is the led...
Hr30 • 19 problem: oscillator inoperative or wrong frequency. Solution: in addition to checking solder joints, be sure that l1 is oriented correctly and that c1, c2, c3 and c4 are installed in correct positions. Problem: loud ac hum or buzz. Solution: if you are using the receiver with a battery or ...
Hr30 • 20 for instance, if you choose a dc power source other than the 9-volt battery, the space allowed for the battery offers plenty of room for a top mounted perfboard or pc-board for preamp stages and or any sort of passive or active audio filter that suits your needs. Keep your work neat with s...
Hr30 • 21 if you want the opposite of bandspread (that is as much frequency range as possible over full rotation of the tuning knob ) increase the value of c4. This will cause the varactor diode to have greater effect on the tuning. Try values of 33pf up to 100 pf. Frequency stability: a kilohertz o...
Hr30 • 22 counter’s busy humming action in the background, but not to a serious degree. It drops out with a slight reduction of the rf gain. If you decided to add such a counter connection to your receiver, remember that the coax as well as the coupling capacitor become part of the oscillator circui...
Hr30 • 23 additional lm386 used as af preamplifier between u1 and u2: pins 1,7,8: not used pins 2,4: to ground pin 3 to ‘-’ side of c*(2.2pf) pin 5 to ‘+’ side of new 1 to 10µf capacitor pin 6 to ‘+’ dc supply board trace the ‘-’ side of the new capacitor is connected to the circuit trace leading to...
Hr30 • 24 construction notes:.
Hr30 • 25.
Hr30 • 26 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 assembled...
Hr30 • 27 3. Factory repair of assembled kits: to qualify for ramsey electronics factory repair, kits must: 1. Not be assembled with acid core solder or flux. 2. Not be modified in any manner. 3. Be returned in fully-assembled form, not partially assembled. 4. Be accompanied by the proper repair fee...
Hr30 • 28 hr30 amateur receiver kit quick reference page guide introduction to the hr30 .................4 circuit description ...........................6 parts list ..........................................7 schematic diagram .........................9 parts layout ..................................
