Vacuum Tube Audio - New Project. Background. This instrument, purchased off of e. Bay in July 2. 01. IM distortion analyzer that I purchased a couple of years earlier. The new instrument, unfortunately, was in poor shape.
Chúng tôi rất tiếc, website không hỗ trợ trình duyệt của bạn. Để sử dụng hết các tính năng mới, bạn vui lòng sử dụng 1 trong. This is an archive based on a page that used to be at http:// It has been reassembled from my copy (saved when the site was live. I just bought a Heathkit IM-5258 Total-Harmonic-Distortion Analyser on ebay and I haven't had much luck finding a reasonable priced copy of the manual. Updated: 1/15. This page is intended to be a reference list of basic specifications for electronic test equipment, especially obsolete models. I have been collecting. Directory listings of factory automation, process control, and instrumentation products manufacturers by alphabet M-O, suppliers and vendors of plc, scada, hmi. Pictures schematics and other information on electronic kits like Heathkit - EICO - Allied Radio and others.
Furthermore, I really had no need for two of these instruments—but I got it for a really good price. While not a particularly valid reason for buying something, it represented an interesting challenge. Furthermore, I rationalized the purchase by concluding that simultaneous IM measurements on the right and left channels of an amplifier under test would provide a good method of optimizing various operating parameters, notably output tube bias. Like many purchases off e. Bay that are classified as "for parts or not working," I spent more money on shipping the unit than to buy the unit itself. When the instrument arrived, it was in about the shape I expected.
An ample layer of dust and dirt covered the case, the paint was scratched up, and the front panel looked its age (4. My prior experience with test equipment restorations told me that the physical appearance of the analyzer case could be returned to its former self with only modest effort. The front panel, however, was quite another thing.
Nearly all of the Heathkit test equipment built up until the late 1. Limited essentially to a damp, soapy cloth, it is very difficult to clean the front panel aggressively without removing paint and lettering as well. Faced with a rather sad looking front panel, I decided to try updating the panel with a polycarbonate overlay.
Readbag users suggest that catalog2-2007 is worth reading. The file contains 113 page(s) and is free to view, download or print.
The starting point for this restoration project was a rather beat up, Heathkit IM 5248 Intermodulation Distortion Analyzer, as shown on the right in the early stages. Today I’d like to do something a little different and want to invite you – our wonderful reader community – to introduce yourself and tell us a little about.
More about that later.