connectors and connect directly into the recorder, and connect the recorder's output to the amp's "Tape
In." Then for normal listening of Re-Equalized or otherwise processed sound monitor the tape recorder. If
the tape recorder has a "Monitor" switch, it must be in "Source" to do this.
CONTROLS:
The front panel has three controls: Turnover, Rolloff, and Bypass. The Turnover has eight positions: FLAT,
300 Hz, 400 Hz, RIAA, Lp, 629 Hz, 800 Hz, and 1000 Hz. The Rolloff also has eight positions: FLAT, -5
db, BBC, -8 dB, -10 db, -12 db, RIAA, and NAB. The BYPASS switch provides a hard wire connection
from input to output with no intervening circuitry. When switched to “IN,” the two inputs are connected
together providing mono operation. This reduces some noise and facilitates recording.
Turnover (FLAT)
- Can be used with acoustical 78 rpm records and cylinders. Then use graphic EQ for
best sounding bass. Acoustic recording bass compensation is highly subjective. Suggest you use 300.
Turnover (300 Hz)
- This is used for Columbia brand and manufactured electrical 78 records, London
FFRR 78s, BBC broadcast transcriptions, many pre-WWII records & transcriptions, early Western Electric
products. Also, it is useful for improving bass on acoustical records.
Turnover (400 Hz))(AES)
- Some post-WWII 33s, 45s, 78s using the AES characteristic.
Turnover (500 Hz)(RIAA)
- Most post-1935 US 78s, broadcast transcriptions and also for Orthoacoustic
and NAB transcriptions.
Turnover (500 Hz, modified)(LP)
- For early Columbia and some other LPs. 100Hz rumble shelf.
Turnover (629 Hz)
- Used with some early electrical 78s, some 1931 vintage Victor LPs.
Turnover (800 Hz)
- Used mostly by RCA for early RCA-Victor 1950s LPs and 45s.
Turnover (1000 Hz)
- Used with many old 78s, 45s, BBC microgroove LPs, provided there is a sharp
rumble filter.
Rolloff (0dB)(FLAT)
- For acoustical records and all early (pre-1938) electrical 78s and transcriptions. A
low-pass (scratch) filter is useful in conjunction with this setting.
Rolloff (-5 dB)
- This is for a -5 db drop at 10 KHz. Used for some post-1938 78's, FFRR 78s, or to soften
noise on early recordings.
Rolloff (BBC)
- A setting for late 1940s, early 1950s BBC transcriptions. Approx. 2 dB per octave.
Rolloff (-8dB)
- This is for a -8 db drop at 10 KHz. Mostly for early RCA-Victor LPs.
Rolloff (-10 dB)
- Used for some post-1938 78s, early LPs, such as London.
Rolloff (-12 dB)(AES)
- This is used for some post WWII records employing the AES characteristic.
Rolloff (-13.7 dB)(RIAA)
- For most modern records.
Rolloff (-16 dB)(NAB)
- For early Columbia LPs and all NAB and Orthoacoustic transcriptions.
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