[ICOM] Icom 7800 Problem ?

[Scott Ramsey]

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/