[ICOM] Icom 7800 Problem ?

Wed May 2 20:59:35 EDT 2007

A 781 usually runs from 1.8K to 2.2k. After 2K serial numbers are best and 
the fan mod is nice.

Larry L. Ravlin AA7LR EX KØAEY & KD7BXR
aa7lr at msn.com
Extra class @ 20WPM
FISTS #12867

----- Original Message ----- 
From: "Scott Ramsey" <sramsey at nmsu.edu>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Wednesday, May 02, 2007 5:01 PM
Subject: Re: [ICOM] Icom 7800 Problem ?

> Interesting.  In what ways was/is the 781 superior to the 7800?  What 
> would
> one expect to pay for a mint 781??  And of equal importance, does anyone
> have one for sale??
> Tnx
> Scott, WN5DX
>
> At 05:19 PM 5/2/2007, you wrote:
> >Your post was a little difficult to follow Phil but if it helps, I have a
> >7800 of the 600 series serial numbers and it has performed flawlessly 
> >thus
> >far - through an MB5A tuner as well if that matters.
> >Have had a 781 since they first came out and actually prefer that over 
> >the
> >7800. I think if I had your problems, I would not hesitate to get rid of
> >it and all the frustrations.
> >73. Don
> >----- Original Message ----- From: <KG4LRU at aol.com>
> >To: <icom at mailman.qth.net>
> >Sent: Wednesday, May 02, 2007 6:54 PM
> >Subject: [ICOM] Icom 7800 Problem ?
> >
> >
> >>
> >>Too the list
> >>I been an owner of 7800 since January this year , In fact 3 one used and 
> >>two
> >>new ones. A group of us all bought 7800 at the same time a few serial
> >>numbers apart.
> >>
> >>The first radio was used upgraded Roofing Filter radio was just returned
> >>from Icom with the upgrade purchased from Burghardts in SD from Jim The
> >>screen
> >>would disappear I was able to reinstall the display cable that was not 
> >>fully
> >>seated and all was well . I really enjoyed the radio everything worked 
> >>Just
> >>Fine  except the screen problem. I liked so much that Bought a new one 
> >>and
> >>shipped the  radio who in turn resold the radio T a Buddy of mine in BC
> >>Harry  Ve7JH
> >>in  BC . HE received it and all was well for two weeks Then one day 
> >>screen
> >>Flashed  bright white  and radio tripped the rear circuit breaker after
> >>resetting  the radio did power back up and worked but no power output.
> >>The radio was
> >>returned Burghardts for repair and tradded for a new 7800. ( Harry and I 
> >>have
> >>run 781 since the radio was first built) Harry had decided that owning a 
> >>new
> >>one  since he owned the 781 so long that he would prefered to own a new 
> >>unit
> >>as I did  . Burghardts shipped him a new one . Used one had lost its 
> >>finals .
> >>
> >>In the mean time My new 7800 had Two weeks of run Time on it and it Died
> >>same fate as Harry Used one . Now Harry had  new one  and my new one 
> >>was in
> >>transit back too Burghardts .
> >>
> >>WE also had a buddy in KC MO KB0VSL who runs a new 7800 Bought from
> >>different dealer But had serial number very close to ours  his 590, mine
> >>604 Harry's
> >>616.  WE all used the same antenna s and use out board antenna  Tuners . 
> >>With
> >>talking with Jim at Burghardts and Dan Miles at Icom it was  suggest 
> >>that
> >>because we had out board Tuner this caused the problem
> >>,  Understand  that both
> >>Harry Ve7jh has over 50 years  Naval Radio  Officer and I was first Lic 
> >>in
> >>1969. And never had a problem with our 781 or any  other radios in the
> >>Shack .
> >>
> >>Dan Miles ran  a short Test at Icom on a 7800 It was thought the  radio 
> >>was
> >>going into oscillations  causing the finals to go away or  the on board 
> >>Tuner
> >>was be left on causing the problem. Need less to say the 7800  passed 
> >>not
> >>showing any problems whats so ever.
> >>
> >>Burghardts replaced the Both of our radios with new ones . I have had My 
> >>new
> >>7800 now just shy of two weeks with very little run Time since I travel
> >>weekdays for work. Harry on the other hand  has been operating his
> >>everyday  . I
> >>just received  email from him That his new 7800 ,ser 645 failed
> >>.   Bottom Line
> >>he was in the shack got a call from the XYL to run too the store .  He 
> >>left
> >>the radio on his return the radio was off But the red light was not lit. 
> >>he
> >>reset the main switch on the back panel . The radio did come on and 
> >>received
> >>But No power  output  .
> >>
> >>
> >>Now my radio is still working  . But it got me thinking what could 
> >>cause
> >>this failure without transmitting .
> >>Now I have heard of other 7800 having failures of the same sort. But was
> >>never been able to confirm if they had been the same type of failure .
> >>
> >>I am guessing here  Voltage spikes from the power Lines ? Cant  really
> >>believe that we could have three failures on the 7800.  I live in
> >>KY  were our
> >>power company has power  spikes I can here them on my apcs not  sure how
> >>big of
> >>spike . Also my 781 and Harrys 781 have never had a failure  , Only
> >>difference I
> >>can see is the 7800 has switching supply and the 781 has  Linear supply 
> >>.
> >>
> >>Has anyone out 7800 land experience this type failure .   I   was 
> >>thinking
> >>maybe losing neutral ground could be the problem.  I did a  quick check
> >>but I am
> >>not seeing an unbalanced line.
> >>
> >>I know that 200 watt radios have had more final problems than the 100 
> >>watts
> >>ones regardless of Brand ,this was confirmed By Jim  at Burghardts  .
> >>
> >>I am thinking Heavy Duty surge protection . Please If you have had  this 
> >>type
> >>failure Let me Know.
> >>
> >>
> >>
> >>Phil Zavagli AI4DQ
> >>
> >>
> >>
> >>
> >>
> >>
> >>************************************** See what's free at 
> >>http://www.aol.com.
> >>----
> >>Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> >>Icom Users Net: Sundays, 1700Z, 14.316 MHz
> >>Icom FAQ: http://www.qsl.net/icom/
> >
> >----
> >Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> >Icom Users Net: Sundays, 1700Z, 14.316 MHz
> >Icom FAQ: http://www.qsl.net/icom/
>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> 