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WA2FTV

Joined: Sat, Mar 3rd 2012, 03:12 Roles: N/A Moderates: N/A

Latest Topics

Topic Created Posts Views Last Activity
Sheet Metal Fabricator for HAM Projects Jan 13th, 12:09 3 359 3 weeks, 4 days ago
Accu-Keyer and Accu-Memory Boards or Artwork Nov 26th 2017, 18:07 4 739 on 30/11/17
450Ω vs 600Ω ladder linr to feed loop antenna using 4:1 Balun Apr 17th 2017, 18:36 2 664 on 21/4/17
QSL Organizer - MIL Industries - Panorama City, CA - In Business? Jun 24th 2016, 11:43 2 531 on 24/6/16
High Minimum SWR (2.5 - 3.0) on 20m Apr 3rd 2016, 10:53 5 670 on 6/5/16
WAS - CW; Need SD to complete Jul 22nd 2015, 20:14 1 1,763 on 22/7/15
Ideas for an Apartment Balcany Antenna Apr 21st 2012, 03:04 2 2,387 on 21/4/12
QSL Card Call Sign Format Mar 12th 2012, 01:10 3 2,265 on 20/3/12

Latest Posts

Topic Author Posted On
Sheet Metal Fabricator for HAM Projects WA2FTV on 13/1/18
Hello Everybody

Does anyone know if there exists any sheet metal fabricators that would cater to the amateur radio hobbyist market.

I like in an apartment and do not have the space for such tools.

A search of the local makerspace organizations do not seem to have the equipment required.

There is a project that I would like to duplicate in one of ARRL's specialized publications that requires an electronic enclosure. A web search has not yielded any satisfactory results.

Please reply to this forum if you know of any such organization or company.

Thank You and 73s

Cedric
WA2FTV
Accu-Keyer and Accu-Memory Boards or Artwork WA2FTV on 30/11/17
I contacted FAR Circuits as suggested.

They never made these circuit boards. So they do not have the files.

I seem to recall that circuit board artwork for a variety of projects was in the annual ARRL hand book some years back. Does anyone know if the artwork was published in the ARRL handbook and what years for the Accu-Keyer and Accu-Memory?

Contributors on the various ham radio forums have indicated that the artwork might be in the 1977 ARRL handbook. Can someone verify this info?

FAR Circuits can make the circuit boards from a good copy.

The articles that I downloaded from the ARRL website included the artwork for the circuit boards, however, they were not clear copies. You can barely see the traces.

Any assistance that can be provided would be appreciated.

Thank You and 73's

Cedric
WA2FTV

Accu-Keyer and Accu-Memory Boards or Artwork WA2FTV on 26/11/17
Greetings Everybody,

I hope that this is the right area for this question.

I am wondering if anybody knows if there is a source for the artwork (circuit board layout) for the Accu-Keyer designed by WB4VVF and the Accu-Memory designed by WB4VVF along with W4YUU in 1973 and 1975 respectively.

I doubt that the circuit boards are available. If they are I would purchase a set or two.

I have downloaded the articles from ARRL's website. The circuit board layouts are not clear.

While in college in the late 1970's, I built an Accu-Keyer. I would like to build a second one due to job travel. I never built the Accu-Memory. I would like to build one, maybe two.

I believe that I have located a few sources for parts on the secondary market.

The original design uses the 7400 series of TTL logic chips. Does anybody know or have experience with the other TTL logic families (74LS, 74HC, 74HCT, etc.) in these designs and know how well the Accu-Keyer and Accu-Memory would operate? Any issues to be aware of?

I know that you do not mix families of logic types. What every I purchase will be of the same family.

Any information would be greatly appreciated.

Thank You and 73's

Cedric
WA2FTV
450Ω vs 600Ω ladder linr to feed loop antenna using 4:1 Balun WA2FTV on 17/4/17
Hello Everyone,

I reside in an apartment (courtyard style) with no access to outside (i.e. no balcony).

I am considering installing a large loop antenna and feeding it with either 450Ω or 600Ω ladder line from a 4:1 balun. This in turn would be fed by an antenna tuner.

Other than losses, is there any advantage of 450Ω or 600Ω ladderline?

Please advise.

Thank You and 73s

Cedric
WA2FTV
QSL Organizer - MIL Industries - Panorama City, CA - In Business? WA2FTV on 24/6/16
Hello Everybody,

I am placing this note here because none of the other categories seem to be appropriate. If anybody has any information, please respond.

I am wondering if anybody knows if the QSL Organizer manufacturer/distributor MIL Industries of Panorama City, CA is still around or operating under a different name. They advertised in QST in the late 1970's and possibly the 1980's as I recall, since I received my license in 1976.

I purchased one QSL Organizer from them in the late 1970s or early 1980s. They sold an organizer (padded notebook) type album and plastic sleeve held three QSL cards on each side (six per page).

I like the format and would like to purchase a second QSL Organizer. The first one if full.

I left a note on QRZ.com in May, 2015, but nobody has responded.

Please let me know if anybody has any information.

Thank you and 73s

Cedric
WA2FTV

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