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发表于 2012-6-12 14:52:54
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本帖最后由 yjwu 于 2012-6-13 16:33 编辑 , w' {1 q" ?. ?
* C" ]' ^ i# Y8 a" \有pdf格式的手冊,但是關鍵性的圖紙則尚在搜尋中
; \6 h# {' S, ^有的圖紙為2388.pdf, 2486.pdf, . A6 c$ Z1 `2 r5 Z, ^
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有興趣的話可加入Yahoo討論群Lyrec論壇(http://tech.groups.yahoo.com/group/Lyrec/)5 b* X2 \/ u8 U. }0 c% R
,註冊的人不多,但是在2012年4月14日
9 Q8 j5 B7 |! L* H2 wLyrec PTR-1的主要設計人J鷨gen Michaelsen也加入了論壇,下面是一份發帖
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I want to welcome J鷨gen to our group. At the risk of our besieging him with: a9 U/ `3 \, |$ f! l1 w
questions, J鷨gen was the designer of the Frida. He has kindly joined the group
( W7 M, B- N0 T% oand hopefully when we are up against the wall with a technical question I hope3 v* F# c$ ]0 \7 @
he will share his knowledge. He sent me an earlier email:* S: g" ]- e6 n$ S) T" m
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Dear Harold
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I should like to introduce myself as owner as well as the chief designer/ X. L8 I" C. u8 D) G' H; l
for the Lyrec PTR-1 in the early eightees. I found this machine
' h% |- h9 E. x# t+ zunfortunately was too late for the market and I was reluctant to make
# F4 } k3 w$ j% f6 W5 e) Rthe design - but anyway a lot of innovative solution were chosen from4 L a9 R5 J3 s' N4 {) y
design start. Just to name a few: 1. Switch mode PS for reel motors. 2.9 ]" A; C% i( A, X$ w$ ~
Very high bias frequency with HX. 3. Real current record amplifiers with7 Y, D$ v6 G# X$ N+ O Y/ k
background from instrumentation amplifiers. 4. Switchable EQ without# o" r3 Y5 F* S( c' p$ O
sep. adjustments. 5. Belt driven capstan for easy substitution of
+ ]6 x8 v6 D6 `* G) |capstan motor. 6. Assembler programmed mProcessor for high speed
0 C) G( o8 Q5 s5 t& tcounting. 7. J-Fet head-preamplifier stage and so on. In particular the
; W7 b+ T' ~8 h& S& U' `* ~SMPS for the reel motors contribute to the small size and weight without2 E) V! A! b# H- d8 [ C2 y
sacrifice of wind performance.
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If you have any background questions - Kind regards - J鷨gen
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Lyrec PTR-1創新的設計:* U* ~) {8 p8 v5 e
1. 捲帶馬達切換式電源供應(Switch mode PS )
1 S, y: t: |* V; u* D1 `! V2. 極高的偏磁頻率( i6 W8 e: x3 i0 F4 m; a
3. 錄音放大器使用真正的電流放大(?) Real current record amplifiers with background from instrumentation amplifiers. Z) Y0 c# U2 t3 X, I x( t
4. 可直接切換的等化曲線設定 9 j! J" |# U5 h6 f( p# ?
5. 皮帶驅動的主導軸;便於直接更換主導軸馬達8 P4 j( H+ u, D$ F
6. 直接以組合語言程式控制微處理機8 X" c# H/ f* z/ d( y9 h
7. 使用J-FET的磁頭輸入前置放大器
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; c; }+ L+ C2 L' L1 }其中 捲帶馬達使用切換式電源供應使捲帶馬達尺寸及重量大幅縮小,但仍保留優異的捲帶性能7 _0 K9 U( [) J6 j2 C; ^
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附圖為一位韓國開盤機愛好者的帶架子的Lyrec PTR-1 "Frida"
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Lyrec PTR-1 Mk-II的特徵是快進/快退有對應的LED,照片中一對剛好是Mark II(左), Mark I(右);擁有人是Rich Brown。我曾跟他買了一套ReVox C270的錄放音卡. V$ @# \" X; K& X( ]3 T7 U
, h) g: x: G- z我的Lyrec PTR-1 "Frida" Mk-I,面板暫時卸下1 z& [( c" B) Q& m! ~5 B$ U" t; s
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