PeKo Radio
    PeKo Radio is dedicated to supplying solutions to restore or expand radios of all sorts.
    The radio equipment we target covers a wide field from amateur radio equipment to car radios used in vintage cars to
    marine communication radio equipment and so on.
    Often these solutions enable vintage or surplus equipment to be operational again or to convert it to other use, e.g.
    surplus military equipment used for amateur radio purposes.
Vintage and Surplus Radio Support Products

    Currently we are offering the RVB-2 solid state radio vibrator as a solution for radios and other mobile tube equipment
    containing the now aging mechanical vibrators as used in the power supplies. These mechanical vibrators often fail and
    that is even true for replacement NOS (new old stock) units.
    We offer a range of product variations that accommodates different equipment, not just for standard battery voltage
    ranges, but also equipment that uses vibrators with unusual input voltages, e.g. for:
    General Electric model 250
    We offer models that can be used at 2V battery voltages as is used in radios like the GE model 250.
    We recently added a model that can handle very high voltages. Some radios like the R-174/GRR-5 have a vibrator that
    runs on a much higher voltage (100V in the case of the R-174). This vibrator can be replaced by an RVB-2ASHV. For
    clarification please note that this radio also has another vibrator that can be replaced by a standard voltage RVB-2A.

    Quick Links

    The following pages offer more in-depth information on radio vibrators, the equipment where it is used and
    more details on the RVB-2 solution.

    The following pages explain in detail how to connect the RVB-2 and provides a method to assemble the unit
    properly in the old vibrator housing.

    NEW PRODUCT ANNOUNCEMENT: Retrofit/Upgrade Kit for Collins MP1 Power Supply

    We are announcing a new product, designated RVB-MP1. This is an upgrade kit that allows you to overhaul/repair your
    vintage Collins MP1 mobile power supply. The kit replaces the old (corroded) PCB board containing the leaky capacitors,
    and the obsolete DA3F3 germanium transistors.
    The new power semiconductors are located on the RVB-MP1 board itself, so with the RVB-MP1 kit, there is no need to
    install external transistors any more.
    The RVB-MP1 board also replaces all the old electrolytic capacitors as well as the obsolete diodes for new components
    having much higher reliability.
    The upgraded MP1 will be based on power MOSFETs that are microprocessor controlled, running at a higher frequency
    (1600 Hz instead of 900Hz) improving the over-all efficiency from about 65% to over 80%.
    The new RVB-MP1 will offer a sophisticated inrush current regime controlled by firmware. This puts much less load on
    your DC power supply during startup, and will also protect the connected transceiver against sudden voltage steps.
    The new RVB-MP1 board has the same dimensions and mounting hole locations as the original Collins board and can
    easily be exchanged. Only one extra wire has been introduced. This is to supply the microprocessor on the new board. It
    is important that you don't forget to connect this wire, otherwise the new board will not work. See the note below the
    installation video (second video below) for more details.

    We prepared a video that demonstrates this upgrade product and can be seen here:

    A video that shows how to install the RVB-MP1 in your vintage Collins MP1 power supply can be seen here:

    Note regarding the extra wire for supplying the microprocessor on the board:
    At 20:34, 22:16, 28:27 and 36:54 you can see which wire in the existing MP-1 configuration can be re-used and should
    be retained for supplying the microprocessor.
    At 49:41 and 1:04:00 you can see where to attach this wire on the new board (the solder point is designated on the
    board with JP106).

    The original Collins MP1 transformer allows for an optional +130V DC output, as shown by Collins in the original
    schematic diagram. However, the original Collins MP1 board has no provisions to facilitate the additional components
    needed for this feature (depicted as dotted in the Collins diagram). The RVB-MP1 DOES facilitate this option. We provide
    a version where the components for this option are mounted on the board. This version is sold as a RVB-MP1MV.

    There are LETHAL voltages present inside the MP1 while in operation and right after switch-off when the HT capacitors
    on the board have not had a chance to bleed-off yet.
    You should therefore always disconnect the MP1 from the DC input and wait one minute to let capacitors bleed off before
    opening the MP1 enclosure!

    READY TO ORDER? Go to our ordering page to order your RVB-MP1 (or RVB-MP1MV)