High Impedance Headphone Earphone Brunet Paris Type F 2000 Ohms DC 6K Reactive
$20.57
This is one item of original high impedance earphone made by Brunet & Company, Paris at some point in the first half of the 20th century. The measured D.C. resistance is a little over 2K Ohms. You can use these for crystal sets, vintage radios, and they work fine when plugged directly into the headphone socket on my Murphy B40 valve communications receiver. I've tested these on a crystal set too.
The D.C. resistance across the connections measures over 2000 Ohms, though if you bother to measure the reactive impedance at 1kHz, it's more like 6K Ohms in total due to the inductance of the internal windings as seen in the video clip and pictures.
Examples of crystal set radios can be seen here:
Crystal Set One
https://www.interestingelectronics.com/old/henrys_interesting_electronics/loud_crystal_set_radio/loud_crystal_set_radio.htm
Crystal Set Two
https://www.interestingelectronics.com/old/henrys_interesting_electronics/crystal_radio_v2/crystal_set_radio_v2.htm
Choccy Block Crystal Set Radio Kit
https://www.usefulcomponents.com/main_contents/projects/choccy_block_crystal_radio/choccy_block_crystal_radio.html
If you want to buy *any* other item from my Esty shop, additional shipping for small items is generally nothing or minimal, and good discount codes are available for multiple purchases.
These codes are:
SAVE10 10% off 2 items
SAVE15 15% off 3 items
SAVE20 20% off 4 items
You have to enter these multiple item discount codes at the Etsy shopping cart checkout. Please add all items to your shopping cart and checkout altogether with the discount code to get the best deal on multiple items and postage.
This listing is only available on the Pattern website, which runs sales via the Etsy checkout and payment system.
Shipping from United Kingdom
Processing time
1 business day
Estimated shipping times
- United Kingdom : 2 - 6 business days
- North America : 8 - 15 business days
- Europe : 8 - 15 business days
- Australia, New Zealand and Oceania : 8 - 15 business days
I'll do my best to meet these shipping estimates, but can't guarantee them. Actual delivery time will depend on the shipping method you choose.
Customs and import taxes
Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.
Payment Options
Returns & Exchanges
I gladly accept returns, exchanges, and cancellations
Just contact me within: 14 days of delivery
Ship items back to me within: 30 days of delivery
Conditions of return
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.
Questions about your order?
Please contact me if you have any problems with your order.
Privacy policy
I store no customer data other than that stored in Etsy systems.