Icom R7000 12v Conversion

[riverrat373]

I assume that the 12v connector is under the bottom cover since it's not under the top cover where I looked.
The problem is that I seem to have a problem getting the bottom cover off! Is there anything else besides the six screws on the bottom holding it on?

 

[dkf435]

There are screws on the side and if the handle kit is on I think that needs to be taken off also.

Inside bottom cover there is a 4 pin Molex connector with a red jumper that connects the power supply to the radio. Take jumper off and the pin on the pointed end is positive and the pin on the square end is negative the second pin in is the power supply lead. There was a CK-70 kit on Ebay last week, the kit has the DC cord and the bracket that the Molex mounts in and is screwed to the back side of the panel after the slot cover is removed.

David

 

[riverrat373]

There are screws on the side and if the handle kit is on I think that needs to be taken off also.

Inside bottom cover there is a 4 pin Molex connector with a red jumper that connects the power supply to the radio. Take jumper off and the pin on the pointed end is positive and the pin on the square end is negative the second pin in is the power supply lead. There was a CK-70 kit on Ebay last week, the kit has the DC cord and the bracket that the Molex mounts in and is screwed to the back side of the panel after the slot cover is removed.

David

Thanks for the info! I found one from The RF Guys for 14.99.

 

[dkf435]

Thanks for the info! I found one from The RF Guys for 14.99.

That is cable only if the connector is not already mounted on the back of the radio then you need the CK70 bracket or another way to hold the Molex.

David

 

[riverrat373]

That is cable only if the connector is not already mounted on the back of the radio then you need the CK70 bracket or another way to hold the Molex.

David

Yes, I was aware of that when I ordered it. For the money that the kit costs, I think I can live with the connector wires just hanging out the hole in the back.

 

[RFI-EMI-GUY]

Be careful if you power the internal 115VAC to 12VDC power supply with the red radio jumper removed. The voltage will climb to over 19 volts and if you reconnect the jumper, the S meter pilot lamp might blow from the surge.

The Power supply on the R7000 and R9000 receivers are similar linear regulators designs, both have a bootstrap resistor across the pass transistor, that if unloaded, will charge the output filter cap well beyond the regulated 12VDC.

 

[SCPD]

You are definitely better running off 12v if you can .. the radio stays much cooler when it is running off 12v. And I too found that the screws were a bit hard to get off .. after well likely decades of not being touched.

There are more than the 6 screws on the top, as there are side ones as well.

Mine ... I never shut it off due to capacitor issues (I think my display ones need to be replaced sometime .. but other than that it is working very well)

 

[RFI-EMI-GUY]

Most of the heat from the internal power supply is coming from the regulator transistor. In the case of the R9000. a small fan attached to the existing heatsink eliminates most of the power supply heat from the chassis. If in the case of the R7000 you can improve the heatsink and the airflow, the internal supply will see you well. The problem with external supplies is that most are now switchers and you have to get a very good one to avoid noise.