[R-390] What's in the window?

[Barry]

That's very strange.  The text you quote below does not appear in my browser when i view the ad.  It varies from the "While an overhaul such as this goes far beyond the norm, this receiver is also far beyond the norm" on to the end of the ad.  That said, the stuff about the audio mods is not shown when I view the ad.

Anyone else notice this?

Barry - N4BUQ



 On Fri 19/11/10  8:12 AM , rbethman rbethman at comcast.net sent:
> *All,
> 
> *Here is a "copy of the extensive info":  (The area is bounded by ** at
> the beginning and ** at the end.)
> 
> Quite clearly---> ** aftermarket 8 ohm audio stagenestled in the space 
> next to the PTO**
> 
> http://cgi.ebay.com/Late-model-EAC-Collins-R-390A-R390A-R-390-/
> 280589662946?pt=LH_DefaultDomain_0&hash=item4154727ae2>
> I find all the totally off the wall "answers" ludicrous.  YMMV
> 
> Bob - N0DGN
> 
> > Thisreceiver, EAC Serial #2844, is apparentlyone of
> the latest ones, > as shown by the October 1967 date stamp in the
> photos.  It  has the > latest updates, including the IF module filter
> trimmers and the > desirable Cosmos PTO with a wide end point
> adjustment.>
> > It is typical mil-spec, usingmodular construction,
> coil forms > impregnated with Araldit, and teflon wire
> insulation. As shown in the > photos, the engraved front panel and original knobs
> and meters appear > practically new.   The gearing is tight, yet free,
> showing little, if > any wear. All controls are smooth and effective,
> and all filters and > bands function as they should.  This late model 
> receiver is a hot > performer, perhaps owing to the extra care taken in
> its overhaul.>
> > For example, not only were weak tubes replaced, but
> also low noise JAN > tubes were installed in the RF, mixer, and first
> IF. Alignment was > done a second timeafter a month's
> burn-in.>
> > In addition to the usual cleaning, lubing, and
> shaft alignment, tuning > lightness and smoothness were further enhanced by
> deburring and mesh > adjustmentof right angle display drive gear teeth,
> and resetting the > typically over-stiff anti-backlash spring tension
> in the KC shaft > drive gear. Meters were disassembled to adjust
> movement bearings often > overtightened at the factory.  Noise was reduced
> and signal input > increased by using a toroidal balunto get proper
> antenna balance and > correct match to the receiver's balanced 150 ohms, 
> instead of the > typical practice of feeding one side with 50 ohms
> through a nice > looking adapter.
> >
> > For longer tube life, two CL 80 thermistors were
> added to control > filament stressing inrush. A 44 ohm resistor
> ballast was installed to > save unnecessary wear on the3TF7 ballast tube,
> (which is also > included). After cleaning and mechanical alignment
> the controls, gears > and slug racks were lubricated with Bel Ray
> synthetic aviation oil > (some single malt Scotches cost less)
> >
> > While an overhaul such as this goes far beyond the
> norm, this receiver > is also far beyond the norm.
> >
> > Classified Top Secret until 1967, the R-390A is
> considered by some to > still be the best HF receiver ever designed. 
> Stories are told that > R390A's are still in use by the NSA, where senior
> operators far prefer > their quietness over modern, mega-dollar receivers
> from Harris, Racal > and Watkins-Johnsonwith their noisy synthesizers
> and digital filters.>
> > New R-390A receivers built in 1968 (the year
> following this one) were > briefly sold to the public for $1700, which would
> equal $11,000 today.>
> > > antenna matching toroid.In addition, a compact HiFi
> speaker is > included to go with the ** aftermarket 8 ohm audio
> stagenestled in the > space next to the PTO**. (shown in the
> photos).>>
> > Shipping includes professional packing and
> insurance.    Fedex ground > seems to have the best track record,  but I'm open
> to suggestions.  > Local pick up is preferred.  As with all
> electronics, no returns.  > Ships to USA only.
> >
> 
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