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| 1999/10 | New 6384 STC, 6AV5GA STC test | Both new one Note: "STC" =STC amp |
| New Home made RX's mainte/rebuild | New one | |
| 1999/11 | New 6GW8 STC | Newly built |
| 1999/12 | New Reprod BC 0V2, 1V2, 4T super | Partial rev's on 0V2/ 4T super-het |
| 2000/01 | New 6AN5 para SEPP | Newly built |
| 2000/03 | New 30A5 para STC | Newly built |
| 2000/04 | New Add descriptions of | relations b/w P-G NFB and STC |
| 2000/05 | Rev "A study for STC" | Warnings for triode STC operation |
| 2000/07 | Temp trial 6JS6C STC | Newly built |
| 2000/08 | New 6R-HP3 STC | Newly built |
| 2000/09 | Temp trial 6CW5 STC/ New 6550 STC | Newly built |
| 2001/01 | D-NFB mods 6JS6C/EL509 SS
New EL34 para STC |
Trial of new NFB circuit by Mr Noro Simple para version of EL34 Note: "SS" =Semi-STC amp |
| 2001/02 | Semi-STC remodel 6JS6C/EL509
New Restore old RX |
Trial of P-G NFB'ed cath-fol driven Restoration of GT super het RX |
| 2001/04 | New 6Y6G/GT SEPP | Newly built |
| 2001/05 | Renewal 6AC5GT SS/ CV18 GG | With NFB'ed cath-foll dr/ Remodel |
| 2001/07 | New 300B, 1626, Univ-triodes etc. | As semi-STC triodes Note: "Univ" =universal amp |
| 2001/08 | Revival of 6R-HP3 with 6AW8A, 6HZ8 | Univ STC of "Tri-Pen" video tubes |
| 2001/09 | New Mainte of RXs Part 2 | 1V2 >>> super, add X-tal conv/Q5'er |
| 2001/10 | Mods Univ triodes SS Revival 6LR8 STC |
Reconfigure, Add Beam and Pentode, Rebuild with larger OPT |
| 2002/03 | Mods 6AC5GT SS | Changed dir couple-driver to 12BH7A |
| 2002/04 | New CV18 para single/PP
New 6N7GT PP/ UZ79 para PP Add Trouble protection of STC V1 |
As A2 class booster amp As B class booster amp To protect final stage from trouble |
| 2002/07 | New 6BQ5 SS-PP | Newly built |
| 2002/08 | Mods 2A3/45 SS, 300B SS | Both changed VFB tube to 12B4A |
| 2002/09 | New G2 driven P-K NFB'ed sweeper | Evaluation of G2 driven |
| 2002/10 | New Synthetic triode amp by
------- Mr Nonomura | Evaluation of a variation of P-G NFB'ed cathode follower driven |
| 2002/11 | New Two QRP (mini pwr) no-NFB | Single and pushpull one watt amps |
| 2003/07 | New 6BM8 G2 driven single/pp amps | Newly designed/built |
| 2003/08 | New Output impedance of amps | Add new information |
| 2003/09 | New 6BM8/6BQ5 G1G2 driven SS | Add newly tested amps |
| 2003/10 | New Universal G1G2 driven SS
Mods Univ. vari-G1/fixed-G2 driven SS |
Add new amp By G2 driven remodeled |
| 2003/11 | Mods Std BC band 1V2 RX Mods 4 tube super-het RX Separated 455kHz IFT construction |
To cathode follower driven detector IFT selectivity improvement From 5 tubes super-het |
| 2003/12 | Rev Univ. G1G2 driven Mods Univ. vari-G1/fixed-G2 driven | Renamed as "Unified" G1G2 driven Modified as "Separated" G1G2 driven |
| 2004/03 | Rev 1st stage trouble protection | Add notum for relay usage |
| 2004/05 | Mods 6Y6G/GT STC pp | SS trial and remodel |
| 2004/06 | Trial 2SC4029 SS New 6360, 25CD6-GB SS PP |
Power Tr applied final stage Newly test built |
| 2004/10 | New 6N7/6N7GT/79 B-PP New Ebb=30V tube amps | Driver tube driven Evaluation of low B operation |
| 2005/03 | New 2SD864k single/PP amps | Trial building |
| 2005/05 | Mods 2SC4029 SS Rev Univ STC/Univ SS |
Driver changed to 12AU7 Contents re-edited |
| 2005/07 | New 2SC3486 SS | Scale up of 2SC4029 SS |
| 2005/08 | Rev 2SC4029 SS to 2SC5200 SS | Gain adjust/compatibilty check |
| 2005/10 | New 2SD864K SEPP/Single switchable | Trial building |
| 2005/12 | Rev 2SC4029 SS to 2SC3486 SS | Driver condition checking |
| 2006/03 | New 2SC5200 tube driven E-fol SEPP | Trial building Note: "E-fol" =emitter follower |
| 2006/04 | Rev/mod 2SC5200 t-driven E-fol SEPP | step by step |
| 2006/10 | New 2SK3689-01 D-G NFB single | Trial building |
| 2007/01 | Rev KT88/6550 STC | Add 12E1 etc. |
| 2007/02 | Reprod 2SC4029 t-driven E-fol SEPP | Reproducibility test |
| 2007/03 | New Cross reference table for | name of tubes and each amps. |
| 2007/04 | New Summary for STC amp building | (Japanese version only) |
| 2007/06 | Separated X-tal conv/ Q5'er building | from Mainte of RXs Part 2 |
| 2007/07 | Rev Add cross ref table: 12A6/ 38 | and 6AH4GT/ 6BQ5(T)/ EL34(T) Note: "(T)" =Triode connection |
| 2007/08 | New Horizontal sweeper univ. | P-G NFB jointed SRPP driven |
| 2007/09 | New 6CD6-GA STC | As 2nd Horiz swpr univ. |
| 2007/10 | Rev Common used power supplies | |
| 2007/11 | Rev Output impedance of amps | Add DF/two cases |
| 2007/12 | Rev 6CD6-GA STC/ Cross ref tab. | Add 6W6GT etc./ Red triode index |
| 2008/01 | Mods Horizontal sweeper univ. | P-G NF SRPP driven to STC |
| 2008/02 | Mods 2SC4029/5200 E-fol SEPP | Driver triodes replaced |
| 2008/03 | Mods General description for STC configuration related articles | As for protection of RF osc. on triode-pentode tubes |
| 2008/04 | Mods 2SC4029/5200 SEPP | Replaced IC stages to triodes |
| 2008/06 | New 2E24 STC | Newly built |
| 2008/07 | Mods 6CD6-GA STC is remodeled | to Tube checker univ. STC #2 |
| 2008/08 | New EL34(T)pp | Newly built |
| 2008/09 | New EL509 p-k NFB single New 41/42/CZ-504-D p-k NFB single | Newly built Newly built |
| 2008/10 | Mods Tube checker univ. STC Mods Super univ. semi-STC | Add 41/42/CZ-504-D operation |
| 2009/01 | New 7044 p-k NFB single | Newly built |
| 2009/06 | Mods EL509 p-k NFB single | Trial of FET'ed 1st stage |
| 2009/07 | Mods Super univ. semi-STC | Slight changes with chassis renewal |
| 2009/09 | Revival of two STC amps | 6550/KT88 and 6Y6-G_-GT |
| 2010/06 | New Super univ. p-k NFB single | Newly built |
| 2010/07 | Mods Trouble protection of STC V1 | Add relay simu circuit etc. |
| 2010/11 | Mods new Triode driven CV18 GG amp | Former GG STC driv. to large triode |
| 2011/06 | New Research into freq converter | by triodes~tetrodes~pentodes |
| 2012/07 | New 6080WC OTL/2SK3689 D-K NFB | Both are trial building |
| 2012/09 | Mods new Two temp. EL34 PP mono | From 6550 STC & 6Y6-GT STC |
| 2013/01 | New 2SD864(k) PP floating OPT | Trial building |
| 2013/12 | Revival 6BQ5 STC | For decoration demo. |
| 2014/06 | New 6S4-A No NFB single | Trial building |
| 2016/07 | New 2SK3689 STC | Trial building |
| 2017/05 | Mods Report for STC trial | Add MOSFET version |
| 2018/08 | New 6CD6-GA UL s (Eb=200V ope.) Revival as EL34 STC/Holiz. univ. STC Deleted Super univ. semi-STC | Ep=Eg2 condx. applied to UL conn. From temp. EL34 PP mono x2 Replaced by S-univ. p-k NFB |