This listing sold on Fri, Jun 6 at 8:44 PM.
NEW Bogen Communications Models T725 4W Speaker Matching Transformer 70V and 25V
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NEW Bogen Communications Models T725 4W Speaker Matching Transformer 70V and 25V
US $7.95US $7.95
Fri, Jun 06, 08:44 PMFri, Jun 06, 08:44 PM
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NEW Bogen Communications Models T725 4W Speaker Matching Transformer 70V and 25V

mike2002ae8qvd
(2086)
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US $7.95
Condition:
New
Out of Stock3 sold
Sell one like this
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    Shipping:
    US $6.85 Economy Shipping.
    Located in: Menomonee Falls, Wisconsin, United States
    Delivery:
    Estimated between Fri, Aug 1 and Tue, Aug 5 to 94104
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    eBay item number:356189810251

    Item specifics

    Condition
    New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
    Brand
    Bogen Communications
    Type
    Speaker Transformer
    Shape
    Cube
    Model
    T725 / 4PD77
    Connectivity
    Wired
    Features
    Compact
    RMS Power
    4 W
    UPC
    765368481297
    Category

    Item description from the seller

    About this seller

    mike2002ae8qvd

    100% positive feedback•8.5K items sold

    Joined Apr 2000
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    Detailed seller ratings

    Average for the last 12 months
    Accurate description
    5.0
    Reasonable shipping cost
    4.9
    Shipping speed
    5.0
    Communication
    5.0

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      • o***x (1196)- Feedback left by buyer.
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      Product ratings and reviews

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      5.0
      10 product ratings
      • 10 users rated this 5 out of 5 stars
      • 0 users rated this 4 out of 5 stars
      • 0 users rated this 3 out of 5 stars
      • 0 users rated this 2 out of 5 stars
      • 0 users rated this 1 out of 5 stars

      Would recommend

      Good value

      Good quality

      Most relevant reviews

      See all 8 reviews
      • by billsalemnh
        Sep 22, 2021

        These transformers are good for crystal radios!

        I use these transformers as matching units in home made crystal sets. One can transform as much as 40K ohms down to 8 ohms with these units and many other impedance combinations in between. They work very well when using a real 1N34 detector diode. And the secret to great volume is the use of sound powered headphones and of course hiqh quality variable capacitor with heavy litz wire in the tuned circuit. Also, don't forget a high antenna at least 75 feet long and a ground connection with a minimum of two paralleled 8 foot ground rods. Great fun to hear WSM in Nashville TN from here in NH! - billsalemnh

        Verified purchase: YesCondition: NewSold by: aps-controls

      • by robot-b9*class-m3
        Mar 30, 2020

        It provides for the optional imoedence matching necessary to get the optimum yield out of rectivied signals for my crystal sets and other receivers.

        It is the perfect size for many of my applications, and it works superbly. Great value for the cost.

        Verified purchase: YesCondition: Pre-OwnedSold by: rosemarie75

      • by nixotim
        May 28, 2019

        Flexible impedance matching transformer

        This is a good transformer for some development work we are doing. It give us a wide range of impedance matching for the circuit we are evaluating.

        Verified purchase: YesCondition: NewSold by: beachaudio

      • by 53fjCpssSnu@Deleted
        Aug 26, 2016

        Looks good

        I received the transformer and meter checking it looks good. I have not used in circuit yet but I don't expect any problems. Delivery was on time as expected.

        Verified purchase: YesCondition: NewSold by: ecop!

      • by brutkin
        Nov 13, 2018

        Crystal Radio Builder's Must-Have

        This transformer belongs in every crystal radio builder's parts box. It will match your detector's output impedance to almost any headset.

        Verified purchase: YesCondition: NewSold by: nowstore

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