Below you will find some of the useful Heathkit links I have discovered. Also some links to tube suppliers to keep those Vintage Heathkits operational. ENJOY!

Heathkit links

Hcross.RRW: Cross Ref. List of Heathkit p/n's to Indusrty Std.
Nostalgic Kits Central: Service Bulletins, Equipment list by p/n with photos etc.
KL7FM - Bob Norgard's SB-200 Amplifier Rebuild notes.: Useful info if you own an SB-200
Almost All Digital Electronics: Need a digital display for that vintage Rig? I have built and installed the DFD2-301 in my HW-101. Works great! My installation details are hosted at - www.aade.com - under App. notes for the HW-101
WB8VGE - The Heathkit Shop: Nice collection of Heathkit Ham gear
Heath downloads at Bama: Downloadable info, schematics, service bulletins etc.
Heath: Heathkit Master Parts List Volume 1 pages 1-15(Pdf) Be Patient - Will take a while to download!
Heath: Heathkit Master Parts List Volume 1 pages 16-31(Pdf) Be Patient - Will take a while to download!
Heath: Heathkit Master Parts List Volume 1 pages 32-47(Pdf) Be Patient - Will take a while to download!
Heath: Heathkit Master Parts List Volume 1 pages 48-65(Pdf) Be Patient - Will take a while to download!
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The Circuit Archive: Great Heathkit Schematic Page

Mods

K4EQA & Protronics, Inc.: Two RIT Mods for the HW-101
N4NRW: Standby Mod For SB-200
N4NRW: Dialcord modification for SB/HW drive belts
Heath: Heathkit Mod SBM-102-1 Tube Miller effects View.jpg - View7.jpg (Manually change the filename at the end of the link to get next picture)
Author Unknown: Improving the HW-101 Transceiver
WB8JKR: More improvements for the HW-101
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Links to Tube Stuff

Antique Electronic Supply:
Nostalgia Air Tube Substitution Guide on Line:
Vacuum Tubes From Radio Electric Supply:
Tubes -Buy -Sell - Swap:
Surplus Sales Vacuum Tubes:
The 6146 Explained: By Glen Zook K9STH
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Hard to Find Heathkit Parts for Sale 

P/N       Description

411-295  2 Digit Beckman NIXIE display tubes.  Used In Display on SB-104, SP-XXXX power supply and Heathkit Clocks. $30.00 ea   Have 9 left!     
           
443-602   DS-8880N Display decoder and high voltage driver chip.  $10.00 Have approx 11 left!