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1336  eHam Forums / Amplifiers / astro amplifier on: December 21, 2008, 08:10:34 AM
" ... but if it is for 10,15,20,40 M, has selector switch location for each of the above bands."
===
This was a WELL KNOWN scam ...to try to avoid FCC prosecution, etc. during the "go-go" CB craze.
Store this "sweep tube" amp next to the 8-track tape player it was sitting next to .. in a museum ... not for operation.

w9gb
1337  eHam Forums / Amplifiers / SB 200 voltage ? on: December 21, 2008, 08:06:52 AM
Reference SB-200 sites for parts and DIY tips.
http://www.westlawn.net/sk/sb200.html

Harbach Electronics
http://www.harbachelectronics.com/main/page_products_sb200__sb201.html

Tom Snowden, K0GKD
http://www.k0gkd.com/sb200.htm

Robert Norgard KL7FM
http://www.westlawn.net/sk/ampnotes/ampnotes.html

w9gb
1338  eHam Forums / Boat Anchors / sagging output kenwood 820s on: December 21, 2008, 08:00:22 AM
K4EAA has a great web site (references, hard to find parts, DIY tips) for the classic Kenwood hybrids.
http://www.k4eaa.com/

w9gb
1339  eHam Forums / Boat Anchors / Motorola Microphone on: December 21, 2008, 07:58:12 AM
Two web sites that you should visit:

BATLABS
http://www.batlabs.com

Repeater Builders TIP
http://www.repeater-builder.com/rbtip/

Plenty of two-way (Land Mobile Radio Service) technicians and owners with access to Motorola reference materials.

w9gb
1340  eHam Forums / Boat Anchors / ICOM IC-211 2 Mtr restoration project on: August 19, 2008, 07:23:25 PM
I did find a short service manual (14 pages) for the Icom IC-211, here:
http://www.n7tgb.net/pages/radio/icom_docs.htm

w9gb
1341  eHam Forums / Boat Anchors / ICOM IC-211 2 Mtr restoration project on: August 11, 2008, 08:34:46 AM
Stan -

I picked up an Icom IC-211 at the Fox River hamfest (Aurora, IL) in July for $80.  While the radio was cosmetically in excellent condition (all manuals, boxes and documentaiton were with the radio) -- the seller noted that the finals were likely dead (he noted that it did not transmit).  He was the original owner and said that the radio went back to Icom a few years after he ownde it and that a former Motorola tech work on the radio -- awhile back.
Bringing it back to my bench I noted that the RF was very low (mW) from the driver stages -- in fact the final was oscillating!  The receiver was nearly deaf (>2 mV to hear anyting).  SO, I packed it up and sent it to Scott Malcom at MTS -- who knows these radios from his time at Icom Service.

Scott's assessment was excellent.
The normal issues with the plated holes and capacitors with DC-DC converter were previously repaired.  The radio also had the latest version of the display board. These were likely addressed during the 1980s trip to Icom Service.

The other issues were revealing of later attempts to repair:
1. RF final was indeed oscillating.  It was an ECG replacement -- not the original 2SC component.  Scott replaced with the proper 2SC transistor and checked for proper bias.
2. The front end of the receiver section was a mess of diodes (which made no sense) -- Scott removed all of these components and rebuild this area per the Icom specification.
3. The PLL section was badly aligned (someone's golden screwdriver?).  The 14.7 crystal (144-146 operation) had aged and was off frequency.  The crystal was replaced and the PLL section aligned, run for 24 hours and checked again.
4. Scott also replaced a missing RCA jack and metric screw.
I have a ComSpec TE-32D on order to provide CTCSS.
Scott advised me of the 3 connections points for the TS-32 when I instal this accessory.

I received the radio last week from Scott.
It looks like the day it was sold by Icom -- now 30 years ago.  Another Classic Icom radio restored and operational in the radio shack!

w9gb
1342  eHam Forums / Boat Anchors / Heathkit HW-104-Looking for info on: February 17, 2008, 07:27:57 AM
Chad -

Bookmark and familarize yourself with this web page:
http://www.qsl.net/k5bcq/sb104/sb104.html

Contact Kees Talen, K5BCQ (Auston, TX) .. with your specific questions.

Michael F. Elliott, W8KRR (SK; April 20, 2006) was the designer for the development of the Heathkit SB-104.
Released in 1974, it was the FIRST transceiver to incorporate solid-state design, come with a digital frequency readout and be priced for the mass market.
The Japanese were still using earlier tube designs (for example, Yaesu FT-101)

The SB-104 was a mainstay for Heath until 1982, when radios that covered the new WARC bands superseded it.
It was one of the last Amateur Radio kits that Heathkit developed.

Later, Michael was influential in the design of the Drake TR-7. This transceiver was the standard for competition-grade transceivers in the late 1970s and early 1980s.
In his 1979 QST Product Review, David Sumner, K1ZZ, called the TR-7, "...the most convenient this reviewer has ever used. The styling is functional, and is similar to that used in modern, high-fidelity audio equipment." Even today, he calls it "the breakthrough radio of its time."

These two transceivers represented state-of-the-art technology from two American manufacturers.

Michael Elliott received his BS in Electrical Engineering from Northwestern University (Chicago) in 1963.

w9gb
1343  eHam Forums / Boat Anchors / Ranger Resuscitated on: February 17, 2008, 07:15:15 AM
The only thing that's not stock is that silly 9 pin Amphenol/WPI Series 86 "octal" plug on the back.
Can't find that plug ANYWHERE!
==========
First, get the right Amphenol/WPI part number -- so that you can talk to "old school" parts distributors/dealers.

ALSO, be aware some suppliers categorize the part under tube scokets, rather than connectors.

Give a call to these suppliers:

Leeds Radio (NY), since 1923!
http://www.leedsradio.com/parts-connectors.html
Amphenol 86-CP9, 9 pin, same pin circle as the octal.
This is used as the chassis mount power connector (male) on the Collins 51-S1 receiver.  $9.00

Leeds also has the female (cable) side listed under tubes sockets. The female socket is Amphenol 78S9

Just across the northern Illinois border, along Lake Michigan is my favorite place for parts to restore the boatanchors:

Chester Electroncis Supply
(E.M. Cheek)
7709 Sheridan Rd
Kenosha, WI 53143
(262) 658-4616
===============
w9gb
1344  eHam Forums / Boat Anchors / FT-101EE repair on: February 17, 2008, 06:51:28 AM
William -

As you likely know Yaesu servcie centers no longer repairs this model.  
I would suggest that you contact Carol Maher at Fox Tango International - Yaesu User's Group
http://foxtango.org/foxtango001.htm

w9gb
1345  eHam Forums / Amplifiers / Tom's Tubes on: February 03, 2008, 02:56:20 PM
Rob -

Tom Hix, W4TH is Silent Key.  
Contact Tony King, W4ZT -- if you require more details.

w9gb
1346  eHam Forums / Elmers / kenwood 440s/at on: January 19, 2008, 05:47:26 PM
Active Kenwood TS-440S gourp on Yahoo.  25 watts?

What mode?  What band?
What are you using to determine this?  
Bird wattmeter?  Transmitting into a dummy load and not an antenna?

w9gb
1347  eHam Forums / Company Reviews / Beware Idiom Press!! on: January 05, 2008, 06:42:15 AM
Vanity HQ reports that Mr. James Martin, KI4DTV who posted this review changed his call sign twice, since this posting.  First to AI4IK and then to K4KOR when he moved to Tennessee from Alabama in 2006.
1348  eHam Forums / Elmers / Power SUpply on: December 31, 2007, 06:32:10 AM
Start here for DIY
http://www.kbt-dc-supplies.com/fixem1.php

http://www.kbt-dc-supplies.com/info.php

w9gb
1349  eHam Forums / Elmers / Alpha-Delta DX-CC dipole, what I'd like to do. on: December 28, 2007, 08:55:04 AM
IF you are going to go the window/ladder line line approach -- then use the proper balun (ratio) - likely 4:1

It seems that I am collecting antennas (HV2, GR5V, Cushcraft traps) from local amateurs that have been "buying" their way through antenan testing (BTW -- unless you have unlimited money sources, "rich" -- not a route for the poor or financially challenged amateur).

An 80/40 fan dipole or even an 80/40 trap dipole shoudl fit the bill for your antenna needs.  I agree with earlier posts -- why even buy an Alpha pre-built if you are then taking it apart.  It is just wire and insulators !!

w9gb
1350  eHam Forums / Boat Anchors / Antenna rotater model HAM II /CD44 on: December 28, 2007, 06:54:58 AM
Rotator FAQ
http://www.rotorservice.com/faqs.htm

Rotator Identification
http://www.rotorservice.com/serv3%20identify.htm

Wind load data for various antennas
http://www.rotorservice.com/antenna%20wind%20load.htm

BTW, the brake on the HAM II is not as good as later models.  IF you send your rotator to Norm's for rebuild -- they can address (if you reqeust) that issue -- requires exchange of outside casting to fit newer brake.

w9gb
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