Vintage 1950 ' S RARE R. C. A BK - 1A Dynamic Microphone Prop Or Display
Item History & Price
| Reference Number: Avaluer:8167459 | Model: BK-1A |
| Brand: RCA | Type: Vintage Microphone |
| Country of Manufacture: United States |
Hello and welcome to The House of Chrome. You are looking at an RCA BK-A1 pressure (dynamic) microphone first produced in the mid 1950's. It was often seen being used in just about any speech given by John F Kennedy during the late 50's and early 60's as seen in pic # 2. Martin Luther King used these quite a bit at that time as well. Just about anywhere you were in the early 1960's where an important spe...ech was given...you'd see the BK-A1. This Microphone has been thoroughly tested and cleaned. It currently has no signal as the element is dead but will make a good repair project for anybody up to the challenge. You can see that the mic is in somewhat rough shape. This RCA mic was a medium sized, lightweight microphone back in the day and easy to carry around. These days she's a bit bigger than what most would want for a "medium" microphone but who wouldn't want to display an old classic like this in their home, office or studio? She's about 2/3 the size of an E.V 664 microphone. This older RCA mic comes in it's original condition. The umber gray color paint scheme shows typical heavy signs of wear in the paint. There are some heavy spots of corrosion in the metal body. The original metal grill shows almost no tarnish or corrosion. The 10 inch cable is pliable and in good condition showing no signs of cracks or dry rot. It comes with an old male Switchcraft 1/4 inch connector. Original RCA logo is missing. Mic comes with the satin chrome joint mechanism that has the larger RCA style thread. You'll need an AD-1 adapter if you plan on mounting this to a standard desk or floor stand. Joint mechanism has good resistance so you can get just the angle you need. This microphone was ideal for vocals and broadcasting Back in the day. A true 4 on a cosmetic scale of 1 - 10. Below are stats on the microphone and it's performance characteristics... The Type BK-1A pressure Microphone is a high-fidelity instrument of the pressure-actuated type, especially designed for announcing and remote pickup. Its smooth response and frequency range (60 to 10, 000 cycles) make it suitable for reproducing both music and speech. It is effectively non-directional when mounted vertically and is semi-directional when mounted horizontally.The moving element consists of a lightweight molded diaphragm attached to an annular coil assembly which is placed within a magnetic field. Coupled to the diaphragm is an acoustic circuit so proportioned that the diaphragm velocity remains essentially constant for a constant sound pressure from 60 to 10, 000 cycles. The coil is connected to a transformer which provides output impedances of 30, 150, and 250 ohms.When mounted vertically the BK-1A Microphone is non-directional with the higher frequencies uniformly attenuated. When mounted horizontally, the microphone is essentially non-directional for frequencies below 2, 000 cycles, and the higher frequencies are attenuated more as the angle with the perpendicular line to the diaphragm increases. Again, this should be used only for repair, prop or display purposes and it's non-working. As with all my vintage microphones... I can promise you will be happy with it for the price paid. If not...I have a no hassle return policy. The shipping will be on you as I believe that's fair but the original purchase price would be refunded. Simply return in the same nice condition...period. Check my rating. INTERNATIONAL BUYERS ARE WELCOME as well. I have had problems recently collecting on payment for items sold so PLEASE do not purchase this item unless you are capable of paying within 24 hours. Domestic buyer will get priority shipping. If you have any questions feel free to ask and...thanks for looking.
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