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"Radio Boulevard Western Historic Radio Museum (an online virtual museum) Featuring Full Length Articles on:"

"Rebuilding Vintage Radio Communication Equipment Radio Manufacturing History,...Photo Galleries of Vintage Radios Nevada Radio History up to 1940 Featured Equipment: WWII Radio Equipment: Shipboard, Shore, Air Navigation, Ally Equipment WWII Airborne and Ground Mobile Radio Direction Finding Equipment Vintage Long Wave Receivers from 1923-1960+ Vintage Ham Gear from 1929 to the 1950s Wireless Spark-Era Gear from 1909-1925 Telegraph Keys,...Real Machine RTTY click for e-mail: RadioBlvd E-Mail"

"Sept 20, 2026 - "Shipboard Radio Receiving Equipment 1918 to 1927" is now in TWO PARTS.  PART ONE covers the SE-143 with the SE-1387 Heterodyne Oscillator and the SE-1834 RF Amp, Det, 2 stage AF Amp. PART TWO covers the SE-1420 receiver, the IP-501-A receiver and the IP-503 Long Wave Loading Unit. I had to split this write-up into two parts because there was SO MUCH information and photos that I've added. Much more detail on these early shipboard radio receiving equipment including a 2026 revisit to the workbench for the IP-501-A to correct some problems with its 42 year old restoration. Newly added is the IP-503 Long Wave Loading Unit that allows the IP-501-A to tune down to the VLF part of the spectrum. More testing, more experimenting and lots more photos with 15 new photos added for a total of 80+ photos. PART ONE - Shipboard Radio Receiving Equipment 1918-1927   -   PART TWO - Shipboard Radio Receiving Equipment 1918-1927"

"Jul 12, 2026 - "Shipboard Radio Receiving Equipment 1918 to 1925" - SE-143 from 1918 and much more - RCA considered the SE-143 the first receiver that performed adequately for shipboard use. Although it's just an RF Tuner, it's an incredible one, with tremendous selectivity and flexibility for top performance from various types of detectors. All of the testing, experimenting and adjusting is documented with photographs and it all ends up with the SE-143 as an impressive performer. This SE-143 write-up has been combined with the write-up on the SE-1387 and SE-1834 combination "upgrades" for the SE-143. The SE-1387 was a tunable Heterodyne Oscillator to provide CW reception and the SE-1834 was an almost complete receiver minus the tuned front-end. When these upgrades were combined with the SE-143, the receiver had three RF amplifier stages, a detector, a Heterodyne Oscillator for CW reception and two stages of Audio amplification - a seven tube, TRF receiver with tuned Heterodyne oscillator - Wow! Also, this expanded write-up has been combined with an updated version of the former article "Classic Shipboard Wireless Receivers SE1420, IP501 & IP-501-A" to have an enlarged and OCD-detailed look at the wireless techno-electronic evolution that was rapidly progressing from just after WWI up through the mid-twenties. Lots of testing, lots of experimenting and lots of photos (over 70 photographs, including several that are 1920s-vintage) also lots of detailed technical information that's not found anywhere else.  Shipboard Radio Receiving Equipment 1918-1925 (this link goes to PART TWO now)"

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