Heathkit IG - 102 RF Signal Generator - - Restored

Youare bidding on a very nice, very clean, Heathkit Model IG-102 RF SignalGenerator Series No. 13530.   I doubt ifyou will find a nicer IG-102 on eBay.  Iam not the original owner.  Date-codessuggest that this was kitted no earlier than Aug.’65.  The front panel has been rubbed out withseveral coats of Meguiar’s Car Cleaner/Wax. Five of the original knobs have been replaced with Radio Shack 1”hexagonal knobs P/N 274-0416.   The front panel ...Amphenol-type connectors havebeen replaced w/BNC.   The cabinet has been sanded and over-sprayedwith VHT SP-205 high-temperature gray wrinkle, and is very close, if not amatch, to the original Heathkit gray wrinkle. The solitary dual filter capacitor C25A/B has been replaced by twodiscrete 22ufd and 47ufd 160V axial-lead capacitors.  A 3-position terminal strip has been added tofacilitate that replacement.  Bands Athrough E are calibrated with a single tweak at C6 (or C7 depending on yourmanual).  I did NOT adjust any of the coils. The stated accuracy of the IG-102 is 2% and in checking 23 points onBands A through D (100 KHz to 11 MHz), where I’ve used the IG-102 the most, theworst-case error is 3.25%.  The average accuracyof those 23 points is 1.42%.  With afrequency counter, adjusting the individual coils and C6 (or C7), you canimprove the accuracy of the dial with a bit of patience.  The range switch's detent assembly is a bit stiffer than some, but the switch is fully OK.
Anote to the new owner - the attached warm-up tests confirm the obvious - the HeathkitIG-102 is an “economy” RF Signal Generator. It is NOT a frequencystandard!!!  Its individual bands are NOT temperature-compensated.  The five individual coils for Bands A-E arewound on phenolic coil forms.  Warm-up drift increases as you increase thefrequency on any given Band.   Statedanother way, as the main-tuning capacitor’s capacitance decreases by turningthe dial in a clockwise direction, increasing the output frequency, theIG-102’s warm-up drift increases.  Thelowest frequencies are the most temperature-stable.  Warm-up drift also increases as you stepthrough Bands A-E.  The most stablefrequencies are below 1, 000 KHz.  As ageneral-rule, you should allow the IG-102 a couple of hours to warm up, evenmore if you anticipate output frequencies greater than 1, 000 KHz and toward thehigh-end of the dial.  I would say thatthe warm-up characteristics of this IG-102 are “typical”.A copy of the manual can be found on-line, butI will include a copy on CD-R.  Thewinning bidder will pay a fixed $25 shipping fee and I will promptly refund anyexcess.  PayPal only.  CONUS only.    Pleaseemail me with any questions. Dave - WA6VVL          

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