Date: Tue, 24 Dec 2002 03:53:22 -0000 From: "qtx_k " Subject: Off Frequency Greetings - I pulled out my 817 for the first time in about six months to find that it is off frequency on all bands. It appears to be 15-20KHz high on 144 and a proportionate amount on the higher bands. Has anyone else noted this problem? Thanks in advance. Bob ________________________________________________________________________ Date: Tue, 24 Dec 2002 12:14:21 -0000 From: "jamesebell2000 " Subject: Re: Off Frequency BoB, There is quite a thread on this in the archives. There is a small trimpot on the oscillator board that allows you to pull the frequency back in line. There is also a mod to do as well if the freq. will not move enough. 73. Jim =========================================================================== Date: Thu, 06 Mar 2003 16:05:18 +0000 From: "Nigel A. Gunn G8IFF/KC8NHF" Subject: Re: Wrong frequency-readout You need to tweak the trimmer on the master oscillator board to bring it back on frequency. For best accuracy, do it on 70cM band. At 20:59 2003-03-05, you wrote: >Hi, >I noticed that the frequency-readout on 144Mhz is about 5Khz >higher then the real RX/TX frequency. >Does anyone know how i can repair this ??? > >Best regards. >Luis PA3GJP ================================================================ Date: Thu, 20 Mar 2003 00:32:05 -0000 From: "jamesebell2000" Subject: Re: Freq Calibration? > > My 817 frequency was off right from the start and adjusting the > oscillator trimmer didn't have enough adjustment to pull the > frequency right on. It still had 120 Hz to go on 40 Meters. > I replaced the 27 pF capacitor which is paralleled with the trimmer, > with a 20 pf capacitor and the trimmer pulled the frequency right on to > spec. The 27 pf chip capacitor is located on the inside front corner of > the oscillator board adjacent to the connector plug. ("Front here being > the front face of the set). I had to wind a piece of heavy gage copper > wire around my soldering iron tip and file the point into a nice chisel > tip to be able to get at the chip capacitor. I replaced it with a very > small disc ceramic cap with a zero NPO rating. > You have to pull the oscillator sub board out of the rig and have > some means of clamp/holding it to work on it. A magnifying glass is a > indespensible help. This 10 minute job for me was preferrable to > spending $87 for the TCX9 board. Jim VE3DDY/W4 ================================================================ Date: Mon, 02 Aug 2004 11:21:19 -0000 From: "bambazonke01" Subject: Re: Wrong frequency indication --- In FT817@yahoogroups.com, "ik8vrq" wrote: > Hello, > I have a problem with my '817: > > The display shows wrong frequency indication in 144 Mhz band FM. > > To receive signals on 145275, for example, I need to tune up the unit > to 145287.5 Mhz and when I go on TX I send a carrier on 145262.5. > It seems to me that there is a -12.5 shift in RX and a -25Khz one in > TX. > I totally reset the unit but the problem is still there. > > Any advice? > > Thanks all. 73. > > Angelo IK8VRQ/KG6DPO Angelo, The problem is likely with the crystal oscillator. The ft 817 is notorious for being almost on frequency at HF and off a lot at VHF. I had the problem with my 817. Remove the top cover. The osc board is on the left side about 1/2 way along.You can see the crystal and a small trimmer adjacent to it. Gently turn the trimmer with an insulated tool until the receiver slides onto frequency at VHF. This will not noticably affect the frequency at HF but will bring it more accurate. If there isn't enough adjustment in the trimmer capacitor you Will have to make a mod which consists of replacing a capacitor. I'll talk to you further on that if needed. Jim VE3DDY ================================================================= Date: Mon, 2 Aug 2004 15:13:12 +0100 From: Peter Robinson Subject: RE: Wrong frequency indication Start by doing a hard reset - then read the bit in your manual on default offsets and take it from there. GL & 73 de Peter g0fim / aa3jn -----Original Message----- From: ik8vrq [SMTP:ik8vrq@yahoo.com] Sent: 02 August 2004 08:46 To: FT817@yahoogroups.com Subject: [FT817] Wrong frequency indication Hello, I have a problem with my '817: The display shows wrong frequency indication in 144 Mhz band FM. To receive signals on 145275, for example, I need to tune up the unit to 145287.5 Mhz and when I go on TX I send a carrier on 145262.5. It seems to me that there is a -12.5 shift in RX and a -25Khz one in TX. I totally reset the unit but the problem is still there. Any advice? Thanks all. 73. Angelo IK8VRQ/KG6DPO ======================================================================= Date: Sun, 21 Nov 2004 00:04:59 -0000 From: "bambazonke01" Subject: Re: 10 Khz Off on 430 Mhz There is a capacitor in parallel with the trimmer cap and is about 20 pf. Change it to 15 pf and the trimmer will pull the frequency spot on. The cap inquestion is located between the crystal and the adjacent large metal enclosure. I just used a NP0 type miniature disc unit as I didn't have any surface mount caps. It's an easy job to do. Jim VE3DDY > The TX/RX on my FT817 is 10 khz out on the local repaeater. That is > should be on 433.375, but the dial is showing as 433.385. Have performed > the Master reset and tried adjustng the master Oscillator but this is > the closest that I can get it. Seem to recall a fix to the > Osc to allow it to be pulled more, (changing a capacitor?). ======================================================================= Date: Sun, 21 Nov 2004 09:17:16 -0000 From: "bt517295" Subject: Re: 10 Khz Off on 430 Mhz --- In FT817@yahoogroups.com, "bambazonke01" wrote: > > There is a capacitor in parallel with the trimmer cap and is about > 20 pf. Change it to 15 pf and the trimmer will pull the frequency > spot on. The cap inquestion is located between the crystal and the > adjacent large metal enclosure. I just used a NP0 type miniature > disc unit as I didn't have any surface mount caps. It's an easy job > to do. > Jim VE3DDY > > > The TX/RX on my FT817 is 10 khz out on the local repaeater. That is > > should be on 433.375, but the dial is showing as 433.385. Have > > performed the Master reset and tried adjustng the master Oscillator > > but this is the closest that I can get it. Seem to recall a fix to > the > > Osc to allow it to be pulled more, (changing a capacitor?). Jim thanks for the reply I will get onto this over the weekend. Bill G3YTT ======================================================================= Date: Sun, 20 Feb 2005 08:25:48 -0500 From: "Bill Leggett" Subject: Re:Frequency incorrect on FT817 Dale: I had the same problem and didn't know it because I only used the 817 on HF where the frequency error is smaller. I got mine in April 2001 and found the problem in November 2002, so it was out of warranty. When I attempted to venture out into UHF, I discovered the problem on 440 when I could not hit the local repeater. Tuning aroung I heard the repeater up15 Khz from where it was supposed to be. Then on 2m I measured it to be +2.5 KHz actual vs. readout. As I went down in frequency, the error became less. For example on 40m it was only off .5 KHz so I never really notice it. I sent the radio to Yaesu thinking I would be paying lots of money for the repair. They replaced the RF board at no charge. Here is the address I used: Yaesu USA 10900 Walker Street Cypress, CA 90630 Good Luck. 73, --Bill, N8AAM > Date: Sun, 20 Feb 2005 11:36:36 -0000 > From: "daledres" > Subject: Frequency incorrect on FT817 > > > When I use this radio the frequency is incorrect. For example when I > transmit or recieve on 146.470 I need to have all my other radios > set to 146.460 in order to hear this radio. Is there a adjustment in > software that will allow me to correct the frequnecy issue or will I > need to send this unit in for repair. > > Dale Dressler ________________________________________________ Date: Sun, 20 Feb 2005 10:00:28 -0800 From: "Wayne" Subject: RE: Digest Number 2384 When the radio is set to 146.470 and you key the radio, on the display do you see 146.460 or 146.470? If you see .460 and you definitely are on simplex then you may need to send the radio in to have it looked at. Otherwise, if you are on .470 and seeing .460 when you key you might be - duplex with a custom offset. Try a full reset first though. Wayne WB7WHI ________________________________________________ Dale The crystal in the Reference oscillator is known to drift. It can be adjusted with the small trimmer cap on the board. If it exceeds that range, then it can be further adjusted by fiddling with the values of the padder caps. If it keeps drifting, as mine did, then the TCXO option can be fitted which absolutely STAYS PUT! I'm very happy with the third option. Brad VK2QQ ======================================================================= "Off frequency on 2m & 70cm" Posted by: "Johan-Fredrik Grøgaard" johan.fredrik@groegaard.com la7sja Date: Thu Jun 21, 2007 5:04 pm ((PDT)) I think your REF-Unit is off the frequency. 1. Connect the frequency counter to Q1038 (pin 5) 2. Adjust trimmer capacitor TC5001(on the REF-Unit) for a reading of 67.875 MHz (+-10Hz) on the frequency counter. 3. Connect the RF millivolt or an oscilloscope to J5002(pin 2) and confirm that the output is at least 60mVrms or 169 mVp-p 73 de LA7SJA --- In FT817@yahoogroups.com, "nilsbull" wrote: Gang, Here's the deal: I was listening to one of the local 2m SSB guys on an IC-706Mk2G. Thought I'd see if I could hear him on the '817 with a 2m/70cm antenna. Yep. There he was. Off frequency about 340 Hz from what the Icom said was 144.2 MHz. So I dragged the '817 into the shack, turned on the '706 & the '817 and listened to myself on each radio. Transmitting from the '706 I had to tune the '817 340 Hz one direction (don't remember right now) or the other to hear the '706's signal "right." Worked the same way the other way around: to get the '817's SSB signal "right" on the '706, I had to tune the '706 about 340 Hz off. Previous conversations with the local 2m SSB gang leads me to not doubt the Icom's being "on frequency." Then . . . I tried this game on 70cm & discovered that the '817 was even more off on that band than on 2m. Hmmm . . . I wondered if there was button I'd pushed & messed this up. By the way, the menu settings for Menu settings #54 through #57 are at zero, so I'm pretty sure it ain't that. Got any suggestions? "Secret menu" maybe? Nils W8IJN ======================================================================= Re: "Off frequency on 2m & 70cm" Posted by: "nilsbull" nilsbull@juno.com nilsbull Date: Sat Jun 23, 2007 9:18 am ((PDT)) Johan-Fredrik, Takk for rådet. Jeg undersøkte frekvensproblemet og fant at det var IC+706'en som var vanskeligheten! Nå må jeg søke på Icom website til å finne om det er en oppløsning. Så går det. Bedre en radio med et problem enn to med mange. 73! Kanskje vi treffes på radioen en gang. Nils W8IJN ------ Looks like the Icom 706 is the radio off frequency & not the '817. Better one problem with one radio than two radios with many. ------ ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ======================================================================= ================================================================ ================================================================ ================================================================ ================================================================ ================================================================ ================================================================ ================================================================ ================================================================ ================================================================ =========================================================================== ===========================================================================