I attended the Greater Houston Hamfest and as I walked past the tables of equipment I wondered if interest in vacuum tube equipment was starting to wane. Compared to the last few years the prices of collector quality gear had held steady but parts and restorable gear seemed to be going for less. I’d like to know your thoughts if you’ve noticed trends one way or the other.
- Download the Eico 1171 manuals for free from the biggest Eico manual and schematic collection on the web.
- Path: /eico/377/ This is the BAMA archive. These manuals are available for download and free of charge. I am now accepting new manuals for inclusion in this archive. Contact and submission information below Updates. 2019-06-23 Testing site, email me if you have any issues. See below for email instructions.
- For sale is reprint of EICO Model 1171 Decade Resistance Box Instruction Manual. Manual is 6 Pages long, in 5.5×8.5″ Booklet format, same as original. Most of Model 1171 Resistance Boxes were sold as kits. I’ll have a construction manual in my store soon.
The Model 232 (4 1/2' meter) and the Model 249 (7 1/2' meter)are identical electrically. Where portability Is desired, the Model 232 is preferable because of its extremely compact design. The Model 249 is an ideal bench instrument, having extra long scales to minimize reading errors and permitting permanent placement of the equipment at a.
I was happy to pick up a EICO Model 625 tube tester for $15. It is in good condition and appears to work well. The roll of settings for each tube is in good condition and a little searching on the internet supplied settings for older tubes like the number 78 in the picture below.
EICO Model 625 Tube Tester with a number 78 tube |
The EICO 625 is not a top of the line tester but it does basic tests and will let you know if a tube is functioning and an idea of the life left in it. It was sold in kit form for $34.95 in 1958 which is roughly equivalent to $274 in 2012.
Inside the EICO 625 from diyaudioprojects.com |
The EICO 625 is fairly unique in having its own 6H6 diode tube to rectify the 30V filament voltage. It provides DC for the neon short-indicator bulb. If the tube is suspected of having a short then there is a fairly comprehensive series of tests than can be administered to isolate shorted elements.
EICO Model 625 circuit diagram |
Here is the complete TUBE TEST DATA 1/1/78 for the EICO Model 625 Tube Tester
Some settings for less common and older tubes are contained in : eico_625.zipExcellent information on servicing and calibrating your Classic emission tube tester.
Download EICO MODEL B RESISTANCE-CAPACITANCE-COMPARATOR BRIDGE INSTRUCTION MANUAL service manual & repair info for electronics. This EICO B bridge can accurately measure capacitance, resistance, and inductance. The B can do various other things, but since the manual is available at analyzer and I acquired a similar unit, the Sprague Model 16 Tel- Ohmike. The EICO B, the resistance capacitance bridge and the . The Y cap was taken from an old SMPS – (C7 in the original schematic).
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But was lucky it was just the pot. The power factor tester too is also quite handy.
And here you go, this is what it looked like on the inside. If you are not familiar with electronics, do not attempt to repair! Email required Address never made public. Do not run down the voltage fast after eic test on a high value cap. I checked the transformer as well in this process and saw the heater glow from both the tube and the magic eye.
Eico 377 Manual
After verifying the schematics, the first test was the tube test, with just the heater power. This is how mdel it looked when I picked it up.
Overall a great piece of hardware! For Leak testing pot P3 controls the output voltage. But it does get quite warm if I run for long. I was checking an electrolytic V uF cap and rand down the voltage pot from V to 0 and saw some blue flashes from inside.
How to unlock pantech verizon phone. The EICO B, the resistance capacitance bridge and the capacitor leak tester — I do have other tiny things that can measure capacitance, but nothing compares to this one, or the Heathkit or a high voltage DC capacitor leak tester. Sometimes, in the process of looking for something, you come across a few folks, who possessed a wide spectrum of skills and abilities.
I am ordering pF, pF, 2. So I started fixing it.
EICO 950B – Repair/Restoration
Instead, contact your nearest service center! I replaced 3 capacitors 2 didn’t. Especially the V 0. It is fun to work with since it 50 years old. You just need to keep the ration capacitance ratio the same. The basic dico of this unit is very simple. As expected, I found broken cables, joints, exposed cabling.
While I wait for my precision caps to arrive, I can finish rest of the tasks, replace the last few 0. Most relevant ieco See all 6 reviews. In addition, some files are archived, so you need WinZip or WinRar to open that files.
You can see the first light up, after so many years, still on 60V power. Hi, Nice to see a great equipment being put back to use again. In any case, if you do not find the exact value, try a combination of parallel or mdoel caps, e.
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No buttons to hold The think I love the most about this capacitor tester is that you don’t have to hold push buttons in to do a leakage test on electrolytic capacitors. I have recapped and redone some wiring and retubed the unit.
Notify me of new comments via email. So it all looks good. These free programs can be found on this page: This file is downloadable free of charge: I credit this addiction to Paul of Mr. For me the hardest part is getting high voltage wax capacitor replacements like 1. Superb Craftsmanship throughout – well packed – Exceeds expectations in every detail – restoration beyond actual eras original accuracy – thx u Verified purchase: Have used two in series to keep the capacitance close to the original and the rectifier tube specs call for a maximum filter cap of 4uF.
Fill in your details below or click an icon to log in: For a moment I saw it through the eye tube glass. If you want mnaual join us and get repairing help please sign in or sign up by completing a simple electrical test or write your question to the Message board without registration.
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Eico Resistance Decade Box Model 1171 Manual
Vintage EICO Resistance Capacitance Comparator Bridge Model B | eBay
Starr piano serial numbers. But remember, a very high value cap can load and burn the rectifier tube. It can kill you. The power cord was changed to 3rd pin and grounded earth to chassis. I definitely need to get the 5W 10K wire wound pot from eBay. I have put in a new power cord, a new y-capacitor and replaced all the electrolytic ones. It seems to be one of the most popular units out there.
Eico Model 1171 Manual Diagram
I still have more to learn about this unit.