I have wiring details of how to fit the up/down/ASC buttons to the cobra mic & how to wire it for the cre 8900, if you need this plaese use the contact button at the bottom of this pageīelow are LED thermostats control boards mounted in between some Perspex sheet. that I have done is to replace the battery with a 9v regulator, & conected it to pin 6 on the radio, it was 12v out but now 10.6v if you have been following Just like with the CRE 8900 I found that youll most likely want to back the RF gain down a bit to reduce some of the noise and it wont have any large effect on your incoming signals. I have also done the internal mod's found Receive on the radio is very sensitive to the point of being noisy (much like the CRE 8900 I just reviewed). Or with out a fan, & just because the voltage has been dopped it doesn't mean that the radio can't get out, even at the lower voltage it still puts out the same amount of watts & draws the sameĬurrent one last thing you mite have to alter the battery under voltage setting in the radio using the usb cable & softwareĬobra HG m75 that I have modified with the three buttons chnnel up/channel down & auto squelch control (ASC). Conclusion is if the TIP 36c is moved & the voltage is dropped down to around 10.6v this radio will now work fine with The back now dose not go above 40c, with the fan running & without the running it only gets to about 55c & the right hand side barely gets warm. & keeping the mic keyed & at 10.4v the output of the radio & the amps started to drop, so I turned it up again to 10.6v the amps went up to 5.1 amps & the output went up to 6 watts. Radio output to 6 watts by keying up & put a amp meter in the line & it showed 5.1 amps, I then turned down the voltage (I have a adjustable power supply) I then got thinking about the 8 voltage regulator in the radio, do I need to to suppy the radio with 13.8v ? so I set the To get to about 50/60c with the fan running, & it would cool down when the radio was not being used, but the right hand side of the radio still got hot, not as hot I then after moving the TIP 36c I fitted the probe to the heat sink where it is now & the temp used Warnning sticker on case saying CAUTION THIS SURFACE MAY BE HOT. Used to be about 80/95c, the trouble is that there is no where for the heat to go & the top left hand side of the radio used to get very very hot, CRE even put a Before I moved the TIP 36c transistor I had the probe inside the radio next to the TIP 36c, the temperture after 25/30 minutes it is controled by a thermostat that came from eBay (see last two pictures) top right you can see the temperture probe, The fan was fitted before I did this mod. To put some heat sink grease between the transsistor & the heat sink. Here you can see I have soldered the transistor onto the wires & mounted it at the back of the radio using one of the heat sink mounting screws, you will need to Below is the inside my radio, you can see that I have removed the transistor TIP 36c & soldered 3 wires (yellow/red/black) to the board.
So I replaced it & the other transistors & voltage regulator, why, well they were all bolted to the same bit of aluminium that the TIP 36c was bolted to, so that they could beĭamaged as well, the cost about £6.00 for the lot. If you are here reading this then you may have had the same problems that I had with my CRE 8900 CB radio getting very hot, in fact mine got that hot it burnt out the
#Radio cre 8900 mod
If you do not want to do this mod then do not buy any radios made by CRE The CRE 8900 is a brand new radio currently being marketed and sold in Europe by Univercom (France).The radio chassis is new, and while some of the features and the layout of the board are reminiscent of the Anytone AT-5555/CRT6900/Alpha Max AM-1000, this radio is definitely a whole new animal. We will try to resolve all issues in best way however to protect our good name and achieved ebay rating, we always report any unfair, libellous or defamatory negative feedbacks to Ebay.CRE 8900 Mods. Please always contact us before leaving neutral or negative feedback. My guess is this was an easy way to replace their discontinued DR-03T and provide a multi-mode 10m radio. That said unless youre hoping to use 10m repeaters its still pretty usable for 10m. All items are discreetly security marked and serials number noted to aid fraud prevention and any attempted fraud reported to the relevant authorities immediately.Ħ. Its actually a re-badged CRE 8900 which is super easy to mod for 11m. Postal charges are non refundable, "FREE POSTAGE" does not exist all items listed as such will have a postage fee included in the total priceĥ. Postage cost to these postcodes is different than standard.Ĥ. Please contact us before purchase if You are from one of following postcodes: IV, HS, KA27-28, KW, PA20-49, PA60-78, PH17-26, PH30-44, PH49-50, ZE, BT, IM, TR21-25. We are not responsible for courier delays.Please contact us if any applied.ģ. Please always read the description and details about product condition before purchase.Ģ.