My Audio System in my hobbit hole:

Now I prefer to use simple system: Pioneer PD-10AE+DENON DP-7F and Onkyo A-9150 with Fostex FF165WK (6.5inch) plus drone-cone because my main object is hearing more than 1000 LP records and around 100pcs of CD. I will not inrease them any more.

Equipment Model Remarks
CD Player PIONEER PD-10AE  bought in 2019 
Cassette Tape Deck PIONEER CT-970 manufactured in 1981
Record Player BSR/SANYO Rim Drive Motor Kit for 16/33/45/78rpm for playing SP/LP with turn-over ceramic/X'tal cartridges
Full Automatic Linear Tracking DD Turntable Systems TECHNICS SL-5 & SL-J2 with T4P cartridges. I picked up other models from junk too, but after some time of use, all went ill-functioning so I threw them away. Around 1980 many full-automatic linear-tracking models were produced in Japan and now they are available cheaply from recycle shops. Technics SL-10 jacket-size linear-tracker and a few Yamaha linear-tracking models are still highly appreciated by audio-maniacs as monuments. IMO: There is no essential merit of low lateral tracking angle error +/- 0.15 degree while the demerit of linear-tracker is uncountable in practice: unstable mechanically. Another demerit of jacket size turntable: it cannot use record weight/stabilizer for warped record because of space. Hence SL-7/10/15 had record stabilizer incorporated with cover. all models from 1980s: recycled from junk in 2005/2006. 
Full Automatic Turntable System  Now my favorite DENON DP-7F (1987) Quartz-Lock Direct Drive Motor with T4P MM cartridge on swing arm (Not Linear Tracking Arm). VTF adjustment is impossible since the arm is designed for T4P cartridge VTF1.25g (the nominal tracking force of cartridge DL-7 is 1.5g+/-0.25g). There is a small sliding piece on arm wand so that VTF can be adjusted between 1.25-1.5g in effect. The arm  cannot be placed down manually at inner groove radius less than 70mm because automatic velocity trip by sensing fast move of arm such as lead-out pitch starts working at the groove radius within 7cm. This arm is controlled electro-dynamically with coils and magnets. A horizontal motor system (coils & magnet) incorporated into the bottom of arm is working for arm swing & auto return & anti-skating control. The right picture shows another system around the pivots functioning VTF & Arm Lift/Down. After some years of use, unexpected lifting occurred very often and I could not place manually stylus on the expected music band. Reading service manual I replaced deteriorated VR3 (tracking force adjustment) 10 kΩ trimmer with a new one and this malfunction was solved.  I find many cases of troubles after many years are caused mainly by carbon-coated variable resistor. I would change stylus every 2 years after around 1000 hours of use. I have no preference among makes of stylus: Denon genuine(CTN)/Jico/Nagaoka. Hence I have reasonable plan for stock of spare stylus.
In 2022 after 15 years use, another malfunction occured maybe due to switch for size 17/30 so that I try TECHNICS SL-5 : Record sensor/switch is on turntable platter with pop-up adaptor for EP (Turntable does not rotate without record). Simple function of stop/start/cueing/repeat.TECHNICS SL-J2 has rather complicated system with band detective sensor beside plug-in cartridge P-30. These arms are mounted on cover so that it is easy to clean stylus. Personally I doubt floppy arms of linear trackers. Actually after some months, SL-5 went ill-functioning without smooth shift of arm.
I revert to using DENON DP-7F turntable (by touching repeatedly on plastic size switch it starts working now: similar trouble seems common on this model). I prefer DP-7F because ①output signal is not muted by any relay ②prompt manual play is possible. Its sound is not great but very steady with tight bass while sounds from some linear trackers are boomy.
In fact, slide friction on linear trackers is higher than rotational friction of pivotted swing arm. To keep slide friction low and steady is difficult: not maintenance-free.
recycled from junk in 2005. 

This compact arrangement for vertical motor system may be related to Japanese Patent publication S57-37702(not patented).

Turntable DENON DP-2000 (around 1977) Quartz-Lock Direct Drive AC Motor - Nude without plinth and arm.  Running more than 10000 hours: I was used to hear average 2 or 3 records almost everyday during 1978-2000 with this turntable. It works still fine but I play other automatic turntable systems for easiness now. Turntable & Arms are placed on  Dupont "Corian" board 
Tone Arms (standing alone) Micro MA-505 (1976) Dynamic balance arm with detachable shell
CEC HA-937 modified to integral arm silicone oil damper
SME 3009 Series II improved (early model) integral arm without fluid bath
Infinity Black Widow  with fluid bath
Keith Monks Laboratory Arm M9BA Mark III, which I assume as most advanced uni-pivoted arm with magnetic anti-skating device & silicone oil damping similar to Decca International Arm Mercury contacts are dangerous but free from wire friction around pivot.
Cartridges ADC XLM II improved, Audio-Technica AT33PTG & AT-MONO3/LP(Monaural)
Denon DL-102(Monaural), DL-103, DL-110 
Dianix Sigma-1000MC by TECDIA  = Clearaudio Sigma (early model)
Dynavector DV-19A 
Excel SS-20, ES-70S, ES-70E, ES-70EX
FR-6SE, Ikeda 9cV
Ortofon SPU Classic G[1987] with tip R17micron, SPU Mono G[1989]with tip R25micron & sticker on the box indicating SPU Mono GM ,  SPU Classic GTE[1994] and MC20S2[1997]   
Pickering 625E-S2, NP-AT plus stylus(D1527) for SP
Shure M44-7, Me97HE
Sony XL-55(Monaural) etc
Plug-in  T4P cartridges Denon DL-7(MM equivalent to Nagaoka C-502M/P because replacement stylus is common) & Technics P-30 with EPS-30ES(elliptic) etc T4P cartridges are interchangeable: VTF 1-1.5g (average 1.25g), weight 6g, 2cm from connector to stylus.
Head Amp for MC Kaneta-type DC Series No.40 battery amp 26db built up in 2002
Step-up  Transformers for MC DENON AU-300LC Input impedance (3-40 Ohm)
PEERLESS SLC-1  Impedance (3 Ohm) 
Phono Equalisers (RIAA) Home-built NF type 34db (1995) Yasui type Otec NFEQ
Home-built LCR type 41db (1996) LCR: TANGO EQ-600P
Home-built NF-CR type (1998) 37.5/50db  gain (MM/MC)/load CR switches
Pri Amp San-ei kit PR-300 (tube) 26.5+20.5db  Ampex-Dynaco circuit
Attenuator Home-built  T type attenuator: input stage with 0dB buffer and output impedance 600Ω constant  (Year 2000) use after Phono Equaliser/CD and connect to power amp directly
Pad Amp/Controller Cleverish 4 Pad Amp Kit by Trillion  built up in 1989
Power Amplifiers Creek 6060 (65W x 2) 1991
Onkyo A-9150 (30W x 2) 2018
Home-built FET amp (50W x 2) 1995-2001
Home-built Single Triode Tube Amp (2W x 2) NEC 6C-A10(50C-A10) 1980
Line Amp (20dB) for Headphones Home-built All-FET amp (2002) Headphone: Sony MDR-CD900ST
Speaker Systems KEF Q10 (only one channel for use of SP playback) Uni-Q unit (1998)
full-range LC-12S (5 inch) for listening music of old sources before LP era. IMO: Wide frequency equipment is unsuitable for such old music which sounds unfocused or strange with wide frequency speakers.  Box from Hino Audio in Akihabara who produced copy models of Goodmans Maxim system.
Two-ways bass reflex type speaker system  Hino Audio in the same box as above.
Fostex FF165WK (6.5inch) plus drone-cone (8inch Fostex Woofer FW20 as dummy cone) to enhance bass range. Drone cone is boxed inside cabinet with narrow slit according to the invention by Koyama : see drawing 

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