Fwd: Newsletter from MODS.DK July 2013

[Jerry]

Great Site if you have never used it ! For a small paypal donation, or an upload of a manual, mod, etc. and you get 'more access' to files ! They allow 'one download' per day if you do not upload or pay !
Jerry
VE6CPP
DN39or

Dear Jerry, this is the mods.dk newsletter.

Mods.dk has now been updated with some new features.

First of all we have now prepare a new area "Home brew" where you can upload homebrew article. Since we not have any home brew article now you cannot select this area at the moment. But as soon we get the first article it will be possible to select the area.

Then we have also made it much more easier to upload modification and home brew articles. Now you can upload the article direct without contacting webmaster first. It is possible to upload files and pictures to the article and when you should write the text you will use an editor that are familiar with Word or other word processing problems. So it is very easy. You can go to http://www.mods.dk/uploadhelp.php?upload_tropic=21 to see an example how you can upload an modification.

In this Edition, you will find a list of all the new & updated articles now on our site.

New articles.

Created: 18 Mar 2013 Heathkit TT-1

Subject: Reconditioning the Heathkit Model TT-1/TT-1A Tube Tester

I have just completed my most recent paper VR-004 ("Reconditioning the Heathkit Model TT-1/TT-1A Tube Tester") Download the PDF here. Click here to view the article.

Created: 30 Jun 2013 Heathkit SA-5010

Subject: Hi-current -ve keying for Heathkit SA-5010

This is a diagram how to use the keyer to key a transmitter requiring high current negative keying. Click here to view the article.

Created: 10 Feb 2013 Icom ID-51

Subject: Mars modification for the ID-51 A+E

Remove the SD-Card, battery, volume and squelch knob and the antenna. Open the ID-51 due removing the ring from the Volume/Squelch and two screws near the battery. Lift the unit out of the case. Re... Click here to view the article.

Created: 10 Feb 2013 Icom IC-7600

Subject: IC-7600 mod 1st IF to RTL-SDR

When I started to use the IC-7600 I really appreciated the nice display and the Spectrum Scope. I also like to use my PC or Mac to control radios and play with SDRs (software defined radios). Now, the... Click here to view the article.

Created: 15 Feb 2013 Icom IC-2300

Subject: IC-2300 MARS/CAP Modification

RX Frequency Expansion Expanded frequency range: 136.000?]174.000MHz. Note: #05 (USA) is shipped with expanded condition. No hardware modification is necessary. To expand: Push and hold [MONI/ANM]... Click here to view the article.

Created: 15 Feb 2013 Icom IC-207

Subject: IC-207H Band expansion for units that don't transmit once modified with W14 and Diode removal

Some IC207H units hesitate or do not transmit once the band expansion (removal of two diodes and a link W14) is enacted. This is due to a limitation of the PLL phase locked loop in sucessfully lockin... Click here to view the article.

Created: 16 Feb 2013 Icom IC-756PRO2

Subject: IC-756 PRO 2 MARS CAP Mod

TX/RX Frequency Coverage After Modification: TX: 1.600 - 29.999, 50.000 - 54.000 RTX/RX Frequency Coverage After Modification: TX: 1.600 - 29.999, 50.000 - 54.000 RX: 0.03.000 - 60.000 Procedure of T... Click here to view the article.

Created: 04 Mar 2013 Icom IC-2200

Subject: Tx power drop on IC-2200

If power drops with good antenna load (like dummy load)or SWR's are normal. Reset PU (protect voltage) in adjustment procedures Section 5-3 found in ICOM IC-2200H IC-2200T Service manual addendum... Click here to view the article.

Created: 20 Mar 2013 Icom ID-51

Subject: ID-51 MARS/CAP Modification

RX frequency expansion A BAND VHF: Expanded frequency range: 137.000?]174.000MHz. (FM/FMN/DV) UHF: Expanded frequency range: 380.000?]479.000MHz. (FM/FMN/DV) B BAND VHF: Expanded frequency range:... Click here to view the article.

Created: 06 Apr 2013 Icom IC-2200

Subject: LCD Display showing only top half on IC-2200H

It seems that these radios have a problem with our warmer climate in Southern Africa. Ever so often you end up with a radio showing either the top or bottom half of the screen having reduced contrast.... Click here to view the article.

Created: 27 Apr 2013 Icom IC-756

Subject: Modification to replace the wimpy Omron Send Relay in IC-756

By: WD7F John in Tucson www.wd7f.com A couple of years ago, my aging IC-756 started acting up when keying my Kenwood TL-922A linear amplifier. It was erratic and sometimes it would even remain key... Click here to view the article.

Created: 20 May 2013 Icom AH-4

Subject: Replace SO-259 on ICOM AH-4

Replacing the original antenna connector with a SO-259 connector Click here to view the article.

Created: 31 May 2013 Icom IC-9100

Subject: IC-9100 Power Modification

After doing mars caps modification to expand the Icom IC-9100 bands outside the ham space, you could notice that power Out of Band will be limited to 10W. To avoid this condition and obtain the full ... Click here to view the article.

Created: 01 Jul 2013 Icom MISC

Subject: Icom ICBP3 - battery pack repair

I recently repaired a Icom IC BP-3 battery pack and draw the diagram below. Click here to view the article.

Created: 05 Feb 2013 Kenwood TS-2000

Subject: TS-2000 frequency stability

Firstly, I must say that the unit is well within spec, it is just that the applications like the WSJT digital modes, prefers much more frequency stability for weak signal level communications when att... Click here to view the article.

Created: 09 Feb 2013 Kenwood TS-570

Subject: Overheating of TS570 PA, in reception, causing the breakdown of power supply fuse.

I recall that the final stage is, he, fed continuously without TX / RX switching. The device, without being in issue, then gradually heated after a few minutes, the internal fuse PS30 or PS430, slap ... Click here to view the article.

Created: 24 Feb 2013 Kenwood TM-G707

Subject: MARS/CAP and 2 other modification for TM-G707

Here are three mods that I collected on the net. I have made all three mods and they work as advertised. There are 2 "standard" mods from Kenwood, and one "discovered". For all three mods you need t... Click here to view the article.

Created: 15 Mar 2013 Kenwood TS-990

Subject: Here it is the TX mod for all models TS-990

Open bottom. Remove the big L plate (lead to the ctrl unit). Open R335 (see attached picture). Put L Plate back **** WATCH OUT FOR THE FLATCABLES **** Put bottom back. Switch 990 on... Click here to view the article.

Created: 24 Mar 2013 Kenwood VFO-230

Subject: VFO-230 P.S.U. repair

One of my VFO-230's was going on and off intermittently, so it was time to open it up and see what was wrong. I could hear relay RL2 clicking while the fault was occurring, so I knew the problem ... Click here to view the article.

Created: 01 Apr 2013 Kenwood TS-950

Subject: Replacing Q8 unreliable 2sc2922 for robust and realiable NTE2533 for TS-950SDX

If Q8 2sc2922 is dead (collector-emitter become short-circuit), final transistors will be supplied with 70V, and eventually, the finals MOSFETs will be dead. Is common practice replace damaged Q8 with... Click here to view the article.

Created: 09 May 2013 Kenwood TS-950

Subject: TS590S improvement for SSB-Mode

Judging by the incosistant texts to be found on the internet one would beleive that this radio has a problem. Just forget a lot of the set-up tips given and add the following simple and very effective... Click here to view the article.

Created: 12 May 2013 Kenwood R-2000

Subject: Quality issues with Kenwood radios made in the Eighties and early Nineties.

By Pedro M.J. WYNS, AA9HX-ON7WP-C5WP (May 2013) Some people like crossword puzzles, some like jigsaw puzzles. I buy radios and tranceivers on Ebay, BROKEN tranceivers. These are my kind of puzzles. ... Click here to view the article.

Created: 14 May 2013 Kenwood TR-751

Subject: TR-751E / TR-851E Frequency steps in SSB

Both of these radios can be easily modified to do 1 KHz frequency steps in SSB. Go to the PCB where the front connectors are located Locate diode D16 Cut one lead of D16 or remove the diode... Click here to view the article.

Created: 29 May 2013 Kenwood TS-50

Subject: TS-50 Alternate Battery Replacement suggestion

After about 10 years TS-50's memory battery tends to drain. The genuine Kenwood replacement Battery (Part # W09-0515-05) is abt. 13 US$. So I looked for an alternate spare part. It can be repl... Click here to view the article.

Created: 31 May 2013 Kenwood TM-281

Subject: Reduce LOW power on TM-281

Open the top cover. Around chip Kenwood, get the two pins labeled GND and ADJ. Short-circuit the two contacts clip and turn on the radio. This will bring up adjustments, you can open the contacts. ... Click here to view the article.

Created: 26 Jun 2013 Kenwood TH-K40

Subject: TH-K40E TX Extended

To extend TX range. Remove diode D on TX/RX unit. New transmit range will be 400.000 - 469.999MHz Click here to view the article.

Created: 19 Feb 2013 MFJ MFJ-989

Subject: 10 M modificatin for MFJ989

Simple mod, this is a good tuner but in last serials the factory put 2 blue caps in parallel of tune capacitor, the tuner dont work on 10 meters and dont down SWR in 50 ohms dummy load, im fix-it ... ... Click here to view the article.

Created: 15 Apr 2013 Motorola GM-300

Subject: Under the Hood on a Motorola GM300 Series radio

As a beginning radio amateur one has a challenge; how to learn without diving head long into attempting to build equipment and Foundation License holders are faced with the restriction of only being a... Click here to view the article.

Created: 03 May 2013 Motorola XTS-2500

Subject: XTS2500 Firmware Flashkey.

You must purchase a firmware refresh from Motorola. They will send you an iButton USB device to plug into your computer. CPS will then allow you to flash the radio with the latest CVN firmware file, w... Click here to view the article.

Created: 11 Feb 2013 Other MISC

Subject: Curing tuning problems with a SGC MAC-200

After 8 years of unregular use, my tuner started to give me problems. Either there was no tuning solution found or the tuner decided in the middle of a QSO that there should be a better solution and ... Click here to view the article.

Created: 11 Feb 2013 Other MISC

Subject: Shure 527C Transistorized Hand Mike Plug Wiring

The rugged Shure 527C Transistorized hand microphone is compatible with the Alinco DR-635T. The wiring is also the same for Kenwood amateur radios using an 8-pin plug. No battery used, the amplifier u... Click here to view the article.

Created: 25 Feb 2013 Other MISC

Subject: Elecraft K3 transceiver Modifications by I7SWX.

The Elecraft K3 transceiver is one of the most performing HF amateur radio equipment. This does not mean that there are no possibilities for improvements. It is possible that improvements are not as m... Click here to view the article.

Created: 03 Mar 2013 Other MISC

Subject: Polmar DB-32 frequency expansion

Turn off the radio Press and hold the menu and turn on the radio at the same time you will see the word reset Release the button menu Press the key once the menu text will be displa... Click here to view the article.

Created: 24 Mar 2013 Other MISC

Subject: Shouao TS-G3 UHF Radio programming interface.

Build the interface:- Cut the supplied USB lead in half. Bare the ends of the four wires from the micro USB lead (radio connection). Bare only the red and black leads from the PC side USB c... Click here to view the article.

Created: 28 Mar 2013 Other MISC

Subject: Auxiliary I.F. shielding for Ten-Tec RX-340 H.F. Receiver

Some RX-340 owners have reported that a weak image signal can be heard when listening to weak sigals during CW reception. The weak image is a duplicate of the main signal but shifted slightly in time ... Click here to view the article.

Created: 10 Jun 2013 Other MISC

Subject: Oscillation problems on Galaxy/Ranger DX-89VHP

I changed out Q34 in the sideband mixer circuit with a 945P transistor used in the old circuit. After I replace this transistor I was able to adjust VR6, The sideband carrier balance potentiometer to ... Click here to view the article.

Created: 30 Jun 2013 Other MISC

Subject: AGC modifikation for President Jackson 2 ASC

All parts are on the upper side of the main board. All parts are SMD one. This mod will lower the rotation point and it makes the AGC slower (1.5 sec). The result is a Comfortable SSB sound on RX. ... Click here to view the article.

Created: 30 Jun 2013 Standard AX-400

Subject: Standard AX400 frequency block removing 810-835, 860-890 & 915-961MHz

You have the full continuous band 0.5-1300 MHz Modification is very simple (5 minute work): Unscrew 4 screws, open receiver (photo 1). Locate and remove SMD-resistor with a mini solder (photo... Click here to view the article.

Created: 06 Feb 2013 Uniden PRO-510

Subject: Uniden PRO-510XL, low unmodulated carrier (Super swing/Swing Kit)

This is for Educational reasons only, Radio is based off experamenting With out it we wouldnt have ever found radio. This is know as a "Swing kit". It allows a low unmodulated carrier and high modul... Click here to view the article.

Created: 20 Apr 2013 Uniden BC-244

Subject: Automatic Squelch adjustment for Uniden BC-244CLT

The "automatic" squelch on the Uniden BC244CLT is simply a fixed setting that can be adjusted internally to suit your needs. On my unit, I now use the "automatic" setting all the time with fine result... Click here to view the article.

Created: 22 Apr 2013 Uniden HR2510

Subject: HR-2510 frequency shift after rit mod

The TX and RX frequencies on USB were shifted by about 50hz or less, noticable, but not serious. The reason for the slight shift in frequency is the collector of Q106 (10.6975 MHz oscillator) gets a ... Click here to view the article.

Created: 29 Apr 2013 Uniden BC-346

Subject: Bluetooth Modification for the BC346XT

The headset output of the BC346XT is too low for a standard speaker. This makes it difficult to hear the radio is a noisy environment. The following items can be put together very simply and quickly, ... Click here to view the article.

Created: 13 Feb 2013 Yaesu FT-857

Subject: FT857-FT897 Filter Pandemic: some practical repair

This article was written by Pedro M.J. WYNS ON7WP-AA9HX-C5WP and published on www.mods.dk It may be freely copied and published if all references to the author and www.mods.dk are kept. Preface Not... Click here to view the article.

Created: 13 Feb 2013 Yaesu FT-897

Subject: FT857-FT897 Filter Pandemic: some practical repair

This article was written by Pedro M.J. WYNS ON7WP-AA9HX-C5WP and published on www.mods.dk It may be freely copied and published if all references to the author and www.mods.dk are kept. Preface Not... Click here to view the article.

Created: 07 Mar 2013 Yaesu FT-847

Subject: FT847 Low headphone output

Recently I acquired a second hand FT847, I noticed the headphones volume was considerably quieter than the internal speaker - so much so that at a comfortable listening level on the headset if the pho... Click here to view the article.

Created: 24 Apr 2013 Yaesu MISC

Subject: SMA to BNC ADAPTER for YAESU HT

SMA to BNC ADAPTER for YAESU HT By John Hamilton, KD5INM Copyright 2009 This is the SMA to BNC adapter for radios like the Yaesu VX-7R. It has a homemade knurled cap attached to the 6 sided SMA... Click here to view the article.

Created: 27 Apr 2013 Yaesu FT-290

Subject: Quick and easy illumination fix for Yaesu FT290R MK1 and other variants

The Yaesu FT290R is now available quite cheaply on many auction sites, and they are good little radios one major problem is the bulb that illuminates the S meter and LCD fails quite often, so leave it... Click here to view the article.

Created: 05 May 2013 Yaesu FT-950

Subject: Manual 3-band (160m, 80m and 40m) RF Mu-Tuning

This is variable high Q RF preselector used as replacement of original Yaesu RF Mu-Tuning (which cost for 3-bands is 1.350 EUR at WiMo, Accessories FT-950, MTU-160 and MTU-040). Manual 3-band (160m, ... Click here to view the article.

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Revised articles since our last newsletter.

Note, sometimes it can be difficult to see the changes since the update can be a little correct in the text, but sometime the update can be a new picture to the existing article.

Updated: 24 Apr 2013 Icom IC-2AT

Subject: Adding a tone card to your ICOM IC2AT

I got my ham license in 1981 and ICOM IC2AT was my first HT. Ham gears were expensive in the past. The price of an IC2AT HT was HK$1,500 and equivalent to my one month?s salary. IC2AT was one of the ... Click here to view the article.

Updated: 05 Feb 2013 Kenwood TS-590

Subject: TS590 mod 200 watts

Why do the modification? up to 200 watts. less spike effect. no splatter. no "pup effect" in voice modulatin. warm normal. power adjust normal. roe protection normal. AT wor... Click here to view the article.

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