- Cobra 29 rfx 150 install#
- Cobra 29 rfx 150 mod#
- Cobra 29 rfx 150 drivers#
- Cobra 29 rfx 150 mods#
- Cobra 29 rfx 150 Pc#
Internittent audio/modulation: Bad solder joints on pins 1&2 or 2&3 of audio ic.ģ. No TX/RX with Channel LED lit on RX and then goes out when keyed: Bad /shorted C119.Ģ. Receive on adjacent channel: Bad solder joint to C131 (next to 10.240 crystal).ģ. Weak mic gain: Some raios have a 2SC372 mic amp. "Motorboating": Locate C242(.001)on pin 5 of TA7222 audio ic and move to pin 4 of ic.Ģ. The instructions are the same as the Cobra 25 above,EXCEPT the following:ġ.
Cobra 29 rfx 150 mods#
Remove R123 and replace with a jumper.ĬAUTION!!! I do not know if both of these power mods can be done at the same time!!!
Remove final and replace with a 2SC1969 transistor.Ģ. Re-tune L14,L13,L12 for maximum forward power.ġ. OVERMOD: Check for missing or cut D9, missaligned VR5.ģ. Burned R89(15 Ohm 1/2 watt): Replace with a 1 watt.Ģ. LED goes out and NO TX when keyed up: Check C118ġ. NO TX: Check for shorted 33uF(10v) capacitor across C87.Ģ. Channel display reads all 7's or 8's: Leaky/shorted C104(470uF 10v).
Cobra 29 rfx 150 mod#
Place the two wires from the RF gain control in your mod kit by soldering one wire to each of the 220uF capacitors leads.ġ. Solder in a jumper wire from where you removed the wires on the board.
Cobra 29 rfx 150 Pc#
Find the two wires that are attached to the RF gain control, follow them to the PC board and UNSOLDER them.Ģ. You can use different resistor values to get the desired dead-key.ġ. On the solder side of the board, solder the resistor across the 220uF capacitor. In JP6 holes, solder the 220uF capacitor. PARTS NEEDED: 1- 220uF (16 to 25 volt) electrolytic capacitor.ġ- 100 to 200 Ohm resistor. Re-tune coils L10,L9,L8 for maximum forward power. Replace stock final with a 2SC1969 transistor.ĥ. Change R76 (3.3k) to a 1k (located near mike socket)Ĥ. I will always love an amp on the side but these RFX's sound like fun to experiment with plus all the reviews i read say "if installed correctly" they are a good bang for the buck final replacement.1.
Cobra 29 rfx 150 install#
I was gonna buy a 75 and install it myself but now that the 150 is out now and almost tripple the watts plus not removing a ton of parts also, sounds good to me.
Cobra 29 rfx 150 drivers#
and the RFX's are perfect for truck drivers or guys that just want a simple way to perform alot better than a barefoot Mud-duck. Not everybody can run a big linear on a big P.S. For the 150 install you dont remove the radios final, so you can actually put in a switch to actually shut off the 150 (nice option) Sure these RFX's get extremely hot, just add the optional fan-kit, or make your own with a small PC fan from Radio shack. The 150 on a 29 Cobra can get almost 200 watts (depends on what the radio can do barefoot). There is a big difference on the install, the 150 is more of a plug n play compared to the 75 that requires alot of parts to be removed and upgraded. Those RFX-75 & 150's might not be everybodys cup of tea, so before you flush please let me get my gloves on to retrieve it, LOL. The fins are designed to extend past the top cabinet of the radio.įrom one Z-MAN to another.hello. (coming soon).ĥ-3/8" wide (across the back panel of the radio) x 2-1/4" deep (how far it sticks off the back of the radio) x 2-1/2" tall. The RFX150 fins are drilled and channeled for easy mounting of the optional fan kit. Heavy-Duty Power Cord with SAE Connectors and weatherproof fuse holder The familiar push-pull design features time-tested components such as broadband transformers and The RFX150 uses a matched pair of ERF7530 high power MOSFET RF transistors running Class AB. Latest Technology MOSFET’s in an Old School Circuit The fins extend past the transceiver’s top cabinet to allow increased air flow to the heat sink.
That is why the RFX150 features a radically unique design with vertical upward pointing cooling fins. So why would anyone design a heat sink with horizontal or downward pointing fins? In lower power applications this may be okay, but when dealing with hundreds of watts in a mobile environment you need every advantage possible. Unique Vertical Fin Design Maximizes Heat Dissipation. The RFX150 uses a matched pair of ERF7530 75W RF Power MOSFET from EKL Components The RFX150 does not work independently, but it is an integral part from an amateur transceiver and is available for repair and replacement purposes. The RFX150 includes the RF final output stages and low pass Filter section for a 10 meter mobile amateur The RFX150 is a replacement part for 10 meter amateur transceivers.
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