1) It gives me no pleasure to read of your continued troubles, even though I did suspect an issue with your M-710 and posted such back on March 18th....
Looking on the bright side here, the good news is that once you get your hands on a working radio and tuner, you're sure to have a great set-up!!!
2) Do NOT buy anything electronic that you can't test up-front, or at least buy only from truly established/reliable folks....and/or have a 100% satisfaction guareentee /easy return policy....
With ebay, you're taking a heck of a risk....and while I myself have only had one minor issue in many, many years on ebay (a power supply I bought was full of cat hair!), I'm a very discerning electronics
buyer w/ 40 years of experience to draw from....I would never recommend ebay for a unseasoned electronics
There ARE used marine
radios for sale
, from honest folk on the SSCA discussion boards, and here on Cruiser's Forum, etc....
Or send a message to Gary at Dockside Radio, to see what used gear
he has....or send a message to Bill T. and see what he has available...
And you can find dealers (on ebay and elsewhere) that do have at least a 10 to 90 day warranty on used gear
, and some even have a "10-day free trial"...
Check out AES www.aesham.com
and HRO www.hamradio.com
And, of course, always remember "ya' get whatca' pay for"...so looking for bargains is a bad idea, in my opinion!!!
3) As for your specific questions.....
Originally Posted by NorthPacific
Looking at another M710. Refurbished and with Guareentee no Lightening strikes, from an established vendor.
Offering to install a fl-100 cw narrow filter. Is this need or a good thing. Also fiting a 2 tone alarm
what does this do? Also opened for HAM channels this is a good thing for the future?
a) I can't comment on whether that radio is working fine or not....as I do not know the seller, nor their reputation!!!!
b) CW filter is probably a waste of time for you.....since you're unlikely to use CW (Morse Code), and unless you're doing digital-mode contesting, etc. you're unlikely to ever need a 500-hz IF filter for PSK, etc...
(and this would NOT work for PACTORIII/IV, either...)
c) Two-tone alarm
generators were used > 15 years ago, but are no longer useful.....
Prior to 1999, these WERE used to signal other vessels (commercial vessels) or coast stations on 2182khz, as the "2182 Watch Receiver" was not actually listened to much, but was "squelched" and waiting for a "two-tone alarm" to break their silence....(the "static" on 2mhz can be quite deafening!!)
The new GMDSS (effective Jan 1999) replaced such practices and made two-tone alarm generators almost (99.99%) useless....(I say "almost", since it is possible
that someone would hear it and recognize it as an emergency
alarm, but without MF/HF-DSC, you've already accepted that you're not going to be able to easily signal other vessels / coast stations...)
d) "Opened-up" for ham-band use is a good idea.....
I hope this helps....(at least a little bit...
s/v Annie Laurie