CB Radio Antique Radio. Related links We thought you might also be interested in these additional resources we selected from the same category: Ten Tec - Tentec is a leader HF, VHF transceivers,RF amplifiers, antenna analyze Share this resource Share this link with your friends, publish within popular social networks or send it via email. A review should provide useful relevant opinions of a product. Reviews only stating "Its great"or "Terrible product" are not helpful without supporting information why its great or terrible.
If using an anonymous eHam user ID for submitting reviews be aware of a recent court ruling regarding identity disclosure of writers of false reviews. Don't review home brewed equipment or home-brew copies of commercially made products. Reviews are limited to one review per product per reviewer. Edits will go thru the review Approval process. Do not submit a product review criticizing another review or reviewer.
Review authors should be able to share their product experience and opinion without being publicly criticized. In the interest of maintaining objective product reviews for all review readers, requests to remove Approved product reviews may be declined by eHam. Customers and product users will add your product to a product category listing and write reviews when they are ready to share their product opinion.
If a manufacturer would like to announce or raise awareness for their product eHam suggests writing a brief News release and submit it to eHam's News. Click the News header on Home page then look for Add News button.
It's a conflict of interest for manufacturers or their employees to review their own products. Those reviews will be removed. Do not offer rewards for positive eHam product reviews. This could make for a very interesting base station.
N5TGL , Nov 27, Now that looks like a fun project. The G5 has been built and tested but still awaiting opportunity for the QSOs. The G40 has been up and running and, we believe, is the only homebrewed SDR transceiver in the country. The web-based documentation is very thorough and the proponents are very responsive, working on almost a one-on-one basis. Other builders also chime in with their experiences and suggestions.
Proved to be an excellent training opportunity for club work and ham introductory projects for the modern, non-tube-oriented, ham. Nice kit, thanks for posting. Run a temporary connection between each switch and the To test attenuator preamplifier: tune the SDR PC program to 40m signal or connect signal generator with S2 attenuator switch on, receiving signal will decrease for approximately 17dB.
After the attenuator test, turn off the attenuator and turn on the RF preamplifier S3, pre-amp switch and you will notice signal strength improvement of 15dB. Measure the voltage at the testpoint shown below - should read 2. The testpoint is the "north" end of the wire that was installed to the underside of the board. Note: Not all components in the Bills of Material below are represented on this schematic.
It is provided for reference only. Solder the remaining components for Phase 5. Install the three temporary wires, presented ad dotted lines in the graphic below.
These can be installed on either the topside or the underside of the board, according to the builder's preference.
S4 is represented variously on in the G40 docs as S3; switch designations were reworked to adjust for the duplication of S1 in earlier phases.
Be careful - there are some easily confused values in the resistors 2. Note Also the locations of the seven 10nF capacitors vs. Rewire switches S2 and S3 from Phase 4 by removing their temporary wiring and installing permanent wiring as below:. This phase takes two signals I and Q from the PC Soundcard and produces four quadrature outputs to the bilateral mixing switches. The process is essentially the reverse of the RX side.
Since the mixers are bilateral, the TX signals in quadrature go through the same process of sampling and holding, clocked by the Quadrature signals from the dividers. Find the temporary wire placed during Phase 5 to enable CW Monitoring; reinstall the wire on the underside of the board.
Before you can check voltage on NE's in phase 7, ensure you connected the permanent wires specified at the end of Phase 6. Install "W8" to topside or inderside of the board, as fits your preference.
Images below represent the topside and underside views of the placement of W8. Note: the graphics are turned on their side to accomodate the length of the wire. Apply power to the board. Check out voltage on all 8 ICs NE pins 1,2,3,5,6,7. Thread the twisted wires folded end first through the glued cores, starting in hole 1, coming out the other end and looping back through the top core to exit at hole 3.
Continue from hole 3 into hole 2, coming out the other end and looping back into the upper core so as to exit at hole 4. When finished winding, cut the folded end of the twisted wire off, such that you noe have four wire ends. The pair at hole 1 represents the primary leads; the pair at hole 4 represents the secondary leads of the wound transformer. Using an ohm meter, identify the ends of each wire as indicated on the graphic above. You may want to use a small piece of colored hookup wire insulation to identify the "a" or, if you prefer, the "b" wire's ends.
You do not need to worry how to figure out the phasing; if you match the designated leads a1, b1, a, b with the holes as marked in the graphic below, you will have correct phasing. Insert transformer's leads into the PCB holes, as indicated above. Form the leads and pull them tight. Then solder the IRF leads and the two heat sink pins, such that the Transistor side of the heat sink is facing "north" and the blank side of the heat sink is facing "south".
Genesis G40 no SMT! Welcome to the G40 Experience Welcome to my G40 website. The new Genesis Radio line is very interesting departure from the Softrocks in many respects: First, I will not be providing extensive "Heathkit-like" builders notes for the G40 - the work that Nick Hacko VK1AA of GenesisRadio has done on documenting these is first rate and needs little if any augmentation. It does, however, need some aggragation, in that there are multiple sources of guidance.
Perhaps my efforts herein can provide a single, authoritative resource for the builder. Second, the kit does not involve SMT components. Many builders are put off by SMT although many I have coaxed through the first few chips have later confessed that the issue is really overblown. However, for the faint of heart, this kit shields the builder from SMT Finally, while there is coil winding, the few inductors that must be wound are quite easily constructed and are of a size and shape that are pleasantly comfortable for those of us of limited dexterity and eyesight.
Checking out the Schematics - Oops!
0コメント