Hammond Mfg. - Broadcast Quality Audio Transformers

Audio
Broadcast Quality Sealed
(560, 800-844 & 850 Series)

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		click to enlarge
560 Series	800-844 Series	Original 850 Series (see below)

560 Series

Key Features:

Rugged black epoxy potted case with 9 pin connections (.025" square by 0.5" long).
Frequency response @ 0 dbm +/- 1 db max. (+/- 0.5 db is typical) of 30 Hz. to 30 Khz., except 560Q which is 30 Hz. to 15 Khz.
Insertion loss of 1 db max.
Maximum power level 0 dbm.
Electrostatic shield between pri. & sec. connected to core and pin "SH".
Humbucking construction
Balanced split windings on pri. & sec. for circuit versatility.
Primaries and secondaries can be reversed for impedance matching.
Overall dimensions 1.64" (41.7 mm) x 1.33" (33.8 mm) x 0.85" (21.6 mm) high max.
Shipping weight 4 oz. (0.1 kg)

Cat. No.	Application	Nominal Impedance
Cat. No.	Application	Primary	Secondary
560C	Emitter or mic to Line	12/48	150/600
560E	Emitter or mic to Line	50/200	150/600
560G	Isolating or Hybrid	150/600	150/600
560J	Collector to Line or Line to Base	150/600	1200/4800
560L	Collector to Line or Matching	150/600	5K/20K
560N	Collector to Line	150/600	10K/40K
560Q	Matching or Bridging	10k/40k	10K/40K

Mechanical & Schematic Data:

A	B	C	D	E	F	G	H
1.33	1.64	0.85 Max.	0.20	1.30	0.14	0.365	0.17

NOTES:
All dimensions are in inches

800 Series

Key Features:

Deep-drawn steel case with tin plated finish, with two convenient 6-32 mounting studs with hardware.
Hermetically sealed for stable characteristics and long life. Header has nine 0.22" long solder pins.
Frequency response +/- 0.5 db max. from 50 Hz. to 15 Khz.
Insertion loss of apx. 1 db.
Maximum power level +15 dbm. (except 841, 842 & 844 which are +20 dbm) with specified characteristics, or higher levels with reduced low frequency performance.
Electrostatic shield between pri. & sec. connected to terminal 9.
Humbucking construction
Balanced split windings on pri. & sec. for circuit versatility. Primary may be used as a secondary and vice versa for impedance matching.
Overall dimensions 1.75" (44.5 mm) wide x 1.25" (31.8 mm) deep x 2.56" (65 mm) high max.
Shipping weight 0.5 lb. (0.2 kg)

Cat. No.	Application	Nominal Impedance		Max. Pri. D.C. Unbalanced ma
Cat. No.	Application	Primary	Secondary	Max. Pri. D.C. Unbalanced ma
801	Isolating, Matching	*50/200	50/200	0.8
802	Isolating, Matching	*50/200 (60/240)	125/500 (150/600)	0.8
804	Isolating, Matching, Hybrid	*125/500 (150/600)	125/500 (150/600)	0.5
806	Dynamic MIC or Voice Coil to Grid	*7.5/30	10K/40K	1.6
807	Dynamic MIC or Voice Coil to Base	*7.5/30	600/2400	1.6
808	MIC or Mixer to Single or P.P. Grid	*50/200	10000/40000	0.6
809	MIC to Mixer to Base	*50/200	600/2400	0.6
812	Line or 150 ohm MIC to 1 or 2 Grids	*125/500 (150/600)	10K/40K (12K/48K)	0.4
813	Line or 150 ohm MIC to Base	*125/500 (150/600)	600/2400 (720/2880)	0.4
832	Interstage (ratio 1:2)	5K/20K	20K/80K	0
834	Interstage (ratio 1:4)	5K/20K	10K/40K	0
835	Interstage (ratio 1:1)	10K/40K	10K/40K	0
841	** P.P. Plates to Line	5K/20K	50/200	0
842	** P.P. Plates to Line	5K/20K (6K/24K)	125/500 (150/600)	0
844	** P.P. Plates to Line	10K/40K (12K/48K)	125/500 (150/600)	0

NOTES:
* Electrostatic shield between primary & secondary

** Single plate requires parallel feed. When operating at impedances below nominal, power capability is lower and the frequency spectrum is shifted downward, conversely, at higher impedances power capability and frequency spectrum will be shifted upward.

Mechanical & Schematic Data:

850 Series

click to enlarge

Key Features:

Due to the recent high expense of the "pin header" we have changed design to a NEW wire lead version the 850 "A" series.
Please note - only current stock of the parts below will be available after February 2011. Once stock is depleted - please refer to our NEW 850 "A" series.
Deep-drawn steel case with tin plated finish, with two convenient 6-32 mounting studs with hardware.
Hermetically sealed for stable characteristics and long life. Header has nine 0.22" long solder terminals.
Wide frequency response +/- 0.5 db max. from 20 Hz. to 20 Khz. (except units over 5K ohms impedance, may be down 1 db @ 20 Khz.)
Insertion loss of apx. 1 db.
Maximum power level +15 dbm. with specified characteristics, or higher levels with reduced low frequency performance.
Distortion is apx. 1.5% @ 20 Hz. under full power.
Electrostatic shield between pri. & sec. connected to terminal 9.
Humbucking construction
Balanced split windings on pri. & sec. for circuit versatility. Primary may be used as a secondary and vice versa for impedance matching.
Overall dimensions 1.7" (43.2 mm) x 1.2" (30.5 mm) x 1.65" (41.9 mm) high max.
Shipping weight 0.4 lb. (0.18 kg)

Part Number	Stock Status	Application	Nominal Impedance		Nominal Resistance +/- 20%
Part Number	Stock Status	Application	Primary	Secondary	Primary	Secondary
850C *	Contact Us	Emitter or MIC to Line	12/48	150/600	6	70
850E *	Sold Out - See 850EA	Emitter or MIC to Line	50/200	150/600	27	68
850G *	Contact Us	Line Isolation or Hybrid	150/600	150/600	71	71
850H *	Sold Out - See 850HA	Line Isolation or Hybrid	150/600	300/1200	70	140
850J *	Sold Out - See 850JA	Output to Line, or Line to Base	150/600	1200/4800	69	570
850L *	Contact Us	Output to Line, Matching or Bridging	5K/20K	150/600	2240	69
850N*	Sold Out - See 850NA	Output to Line, Matching or Interstage	150/600	10K/40K	65	4980
850Q*	Sold Out - See 850QA	Interstage or Isolating	10K/40K	10K/40K	4890	4980

*NOTE: Due to the high expense of the "pin header" we have
changed design (February 2011) to a NEW wire lead version: the 850 "A" series.

Mechanical & Schematic Data:

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