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IC-E92 frequency mod

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IC-E92 frequency mod - 2/21/2008 9:21:58 PM

rpmccormick

Posts: 32
Joined: 5/28/2007
Status: offline

(let's try posting this in the correct forum!)

Someone from Eu will be traveling to the US in the near future and would like to try out our D-STAR system. He has a new IC-E92 (I assume this is similar to the IC-92AD in the states) but it is limited to the European 2m and 70cm frequencies.

Does anyone have information on how to modify this radio to change its transmit frequency range?

Any information or pointers would be greatly appreciated.

_____________________________

Bob McCormick W1QA
W1KK Wireless Association, Inc.

Post #: 1

RE: IC-E92 frequency mod - 3/6/2008 10:09:39 AM

iz1hmt

Posts: 1
Joined: 3/6/2008
Status: offline

Have anyone this information??
I have the IC-E92...

_____________________________

Matteo IZ1HMT

(in reply to rpmccormick)

Post #: 2

RE: IC-E92 frequency mod - 5/3/2008 12:59:56 AM

SA0AWA

Posts: 1
Joined: 5/3/2008
Status: offline

TX frequency coverage expansion for ICOM ICE92D Remove D4 as shown below:

Procedure:

Turn off the unit, remove the battery or battery case and then remove the six screws on the back side of the transceiver

Carefully separate the front and back halves of the housing (there are a cable harness and a flat cable connecting the two halves together inside. The visible circuit board in the keyboard/display half is the logic unit)

Unlock the locking flap at the flat cable connector on the logic unit and gently pull out the flat cable (after this step the two halves can be turned down side by side and the logic unit is conveniently accessible)

Locate diode D4 on the logic unit just below liner codec IC 503 and remove it by means of SMD unsoldering equipment or a suitable soldering iron (if no special SMD unsoldering equipment is available a soldering iron with a sharp screwdriver tip can be used. Do not use more than 25 W for the soldering iron and edge the tip sharp enough. Heat up the two solder points on one side of the diode simultaneously by touching them with the flat soldering iron tip (don't touch for more than 2 or 3 seconds) while pulling up the diode with a sharp pair of tweezers. The surface of the diode will melt and doesn't look very beautiful after the "surgery" but it will no longer be of any use...

After removal of the diode check the logic unit carefully with a magnifying glass and remove any residuals with an appropriate sized and not to hard paint brush

Reconnect the flat cable to the logic unit and rejoin the two housing halves paying attention to the correct fit of the Oring seal that is responsible for the waterproofness of the transceiver

Reinsert and tighten the six screws removed in step 1 gently.

Switch on the transceiver and check the TX frequency coverage. If necessary do a full reset.

Attachment (1)

(in reply to iz1hmt)

Post #: 3

RE: IC-E92 frequency mod - 7/15/2008 3:47:01 PM

KC2NFF

Posts: 2
Joined: 7/15/2008
Status: offline

I just did this mod for my IC-92AD US version and it worked great... just be carefull when removing the diode. This mod took me less than 5 min. too easy.

(in reply to rpmccormick)

Post #: 4

RE: IC-E92 frequency mod - 9/28/2008 9:04:58 PM

N3GWG

Posts: 69
Joined: 2/11/2006
Status: offline

quote:

ORIGINAL: KC2NFF

I just did this mod for my IC-92AD US version and it worked great... just be carefull when removing the diode. This mod took me less than 5 min. too easy.

Correct me if I am wrong (and I may well be, as I do not own an IC-92AD as of yet), but, I understand that this modification can be conducted with even greater ease by simply removing a tag which is normatively covered by the battery, and then asserting the removal of the D4. Is this true?

_____________________________

73 and Very Respectfully,

Stuart B. Tener, N3GWG
Beverly Hills, CA / Las Vegas, NV / Philadelphia, PA / Washington, DC

(in reply to KC2NFF)

Post #: 5

RE: IC-E92 frequency mod - 1/22/2009 7:29:12 AM

Gav_G0LGB

Posts: 5
Joined: 12/13/2008
Status: offline

Hi what is the new frequency coverage after this mod??

(in reply to N3GWG)

Post #: 6

RE: IC-E92 frequency mod - 1/22/2009 2:11:48 PM

LA9XNA

Posts: 23
Joined: 7/18/2007
Status: offline

quote:

ORIGINAL: N3GWG

quote:

ORIGINAL: KC2NFF

I just did this mod for my IC-92AD US version and it worked great... just be carefull when removing the diode. This mod took me less than 5 min. too easy.

Correct me if I am wrong (and I may well be, as I do not own an IC-92AD as of yet), but, I understand that this modification can be conducted with even greater ease by simply removing a tag which is normatively covered by the battery, and then asserting the removal of the D4. Is this true?

Removing the tag / sticker to do the mod might give you two problms.
1. The hole in the chassi is wery narrow and it is hard to get to the diode.
2. When the tag is removed it is hard to get it back in place as it where cause the plastics will get deformed while removal.

I work for an Icom dealer and have done tenfold of these modifications. What I find the quickest way is to unscrew the 6 screws in the back cover. Move the front slightly to the left to get to the diode.
This operation is usualy done in less than 10 minutes.
My personal record is 20 radios in 90minutes.

(in reply to N3GWG)

Post #: 7

RE: IC-E92 frequency mod - 1/22/2009 2:18:39 PM

LZ1JNG

Posts: 3
Joined: 1/22/2009
Status: offline

I own an IC-E92D and the optional microphone with a GPS HM-175GPS. I don's have any problems with the transmitting GPS position between two IC-E92 but because for the second handy I don't have the GPS microphone I have made a test-connecting a GARMIN 60CSx GPS, with an option cable OPC-1799(which is possible). The used protocol from the GPS to the handy is NMEA but unfortunately I couldn't transmit any data. Has the information about GPS position appear in the menu ''My position'' on the handy to which the GARMIN has been connected because I can't do it. Has anyone has any expirince in this case and am I missing some detail in the menu settings.
Thanks anyway,
73!

(in reply to Gav_G0LGB)

Post #: 8

RE: IC-E92 frequency mod - 1/22/2009 2:30:39 PM

LZ1JNG

Posts: 3
Joined: 1/22/2009
Status: offline

I am sorry I published my qustion here I will post it as a new theme!

(in reply to LZ1JNG)

Post #: 9

RE: IC-E92 frequency mod - 3/12/2009 8:48:36 AM

N3GWG

Posts: 69
Joined: 2/11/2006
Status: offline

quote:

ORIGINAL: LA9XNA

quote:

ORIGINAL: N3GWG

quote:

ORIGINAL: KC2NFF

I just did this mod for my IC-92AD US version and it worked great... just be carefull when removing the diode. This mod took me less than 5 min. too easy.

Correct me if I am wrong (and I may well be, as I do not own an IC-92AD as of yet), but, I understand that this modification can be conducted with even greater ease by simply removing a tag which is normatively covered by the battery, and then asserting the removal of the D4. Is this true?

Removing the tag / sticker to do the mod might give you two problms.
1. The hole in the chassi is wery narrow and it is hard to get to the diode.
2. When the tag is removed it is hard to get it back in place as it where cause the plastics will get deformed while removal.

I work for an Icom dealer and have done tenfold of these modifications. What I find the quickest way is to unscrew the 6 screws in the back cover. Move the front slightly to the left to get to the diode.
This operation is usualy done in less than 10 minutes.
My personal record is 20 radios in 90minutes.

What affect does opening the radio as you suggest have in terms of the viability of the waterproof protection (IPX7, 1 meter underwater for 30 minutes)?

_____________________________

73 and Very Respectfully,

Stuart B. Tener, N3GWG
Beverly Hills, CA / Las Vegas, NV / Philadelphia, PA / Washington, DC

(in reply to LA9XNA)

Post #: 10