Hammond Mfg. - P.C. Board Mount Audio Transformers

Audio
P.C. Board Mount
Open Frame

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148, 149 Picture
148 and 149 Series

Key Features:

Pin type (0.25" length & 0.025" square), P.C. board mount.
Economical, open type, horizontal bracket construction. 149 Series includes clinching lugs for extra mounting strength.
Frequency response 200 Hz. - 15 Khz. (+/- 1 db, ref. @ 1 Khz.).
Total distortion approximately 2% for drivers and 1% for outputs at 200 Hz., decreasing at higher frequencies.
Insertion loss less than 1/2 db.
Bifilar wound for balanced capacitive and resistance characteristics, on pin bobbins for standard 0.2" grid pin spacing.
Insulation test 250V rms.
For rugged epoxy cast type units refer to our 102, 104, 106, or 107, 108 & 109 series.
Net weight: 0.6 oz. (148 Series) & 1.0 oz. (149 Series).

Cat. No.	Applicaton	Nominal Impedance		Pri. D.C. ma (See Note 1)	D.C. Resistance +/- 15% (See Note 2)		Output Milliwatts	Dwg. Figure
Cat. No.	Applicaton	Primary	Secondary	Pri. D.C. ma (See Note 1)	Primary	Secondary	Output Milliwatts	Dwg. Figure
148A	Input	150/600	600/2400	1.9	45	300	300	1
148B	Input	150	400/1600	3.8	11.3	200	300	2
148C	Input	50000	250/1000	0	1760	25.4	12	2
148D	Input	200K	1000	0	1760	6.2	3	3
148E	Driver	500	125/500	18	79	60	75	2
148F	Driver	1500	125/500	11.6	220	58	75	2
148H	Driver	3000	250/1000	7.5	480	107	75	2
148K	Driver	4000	500/2000	6.5	540	230	75	2
148M	Driver	6000	500/2000	5.3	850	230	75	2
148Q	Driver	10000	500/2000	4.1	1700	238	75	2
148R	Driver	20000	250/1000	2.4	2230	123	50	2
148T	Output	500 ct	3.2	2.1	41	0.34	300	4
148V	Output	600 ct	150 ct	1.9	45	14	300	5
148X	Output	4000 ct	3.2	0.8	380	0.34	300	4
148Y	Output	5000 ct	500 ct	0.7	410	52	300	5
149C	Driver	160	20/80	56	24	6.5	200	2
149E	Driver	300	30/120	42	41	9.7	200	2
149F	Driver	450	40/160	33	52	19	200	2
149G	Driver	600	150/600	29	92	58	200	2
149H	Driver	1000	60/240	22	155	24	200	2
149Q	Output	200 ct	3.2	7	19	0.4	1000	4
149S	Output	600 ct	150 ct	4	53	17	1000	5
149T	Output	600 ct	600 ct	4	53	70	1000	5
149U	Output	150/600	8	4	53	95	1000	6
149V	Hybrid	600 ct	300/1200	4	53	63	1000	7

Notes:
1) For output transformers the current figure is for maximum unbalanced current.
2) D.C. resistance shown is for the total primary or secondary windings (ie...if unit contains multiple primary or secondary windings the figure shown is with the windings connected in series.

Mechanical & Schematic Data:

148 Series

149 Series

141 Series

P.C. BOARD MOUNT
(LOW PROFILE)
AUDIO

Key Features:

Pin type (0.25" length & 0.035" diameter), P.C. board mount
Low profile, open type construction
Frequency response 200 Hz. - 15 Khz. (+/- 2 db, ref. @ 1 Khz.)
Net weight 0.6 oz.

Cat. No.	Nominal Impedance		Max. Pri. D.C. ma	D.C. Resistance		Output Milliwatts
Cat. No.	Primary	Secondary	Max. Pri. D.C. ma	Primary	Secondary	Output Milliwatts
141B	200 K	1000	0	3775	85	4
141D	3000 ct	1000 ct	1	120	51	150
141F	25 K	50	2	1645	65	100
141H	600 ct	600 ct	2	32	45	150
141M	30 K	1200 ct	2	1100	47	100
141P	1200 ct	8	2	50	0.45	150

Note: The 141M is incorrectly listed as having a 300K primary in our latest catalogs, the
primary is 30K.

Mechanical & Schematic Data:

catalog pages on this series (464K) 5C0044-45.pdf

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