Heathkit DX-60 AM Net

Masa Scores a Rare TX-88 Off EBay


Projects 0 Comments 03/01/2021 

Posted By: Bradley Stone (stonebs)

 

Masamichi Yamamoto (Masa, AB9MQ) is a long-time check-in and contributor to the DX-60 net.  This transmitter showed up on EBay, and Masa was lucky enough to have won it.

"This model TX-88 is prior to Mr. Takada JH1AMH's TX-88A model.  This is very rare to find on the market.  This is the original design on TX-88 series.  TX-88, TX-88A, and TX-88D. It is interesting the final is 6AR5. TX-88A uses 807 which was commonly available as US army surplus in Japan. Later 6146 was used for TX-88D model.

Some day I will get TX-88D, but D model was so popular that there are abundant in JA market.   On the other hand, TX-88 original is very rare indeed."

- February 24, 2021

TX 88 arrived.

After inspection, I did minor repair on  broken crystal socket and lamp
holder.

I am awaiting for capacitor supplies from Justradios.com.

I am not quite sure if I should proceed for recapping....  This is
almost museum quality.... worth preserving the history...

I also got 1960s old Japanese electronics magazine which had an article
about TX-88.

TX-88 was made in 1959 by Kasuga musen by the original owner of Trio
(Kenwood) Mr Kasuga. The company changed its name around 1960 and hired
Mr. Takada, then produced TX-88A multi band AM transmitter.

Mr. Takada JH1AMH must have noticed that TX-88 did not quite match to
9R-42J (Similar to Lafayette HE-10) . It is much smaller than the
receiver.  He must have wanted to develop 9R-59 (Lafayette HE-30) to
match with TX-88A (refined version of TX-88).

You may be able to see in the under chassis photo that bypass capacitors
(oil condenser) were made by Suzuki musen. It has a word "Tu Pa Con".

I heard this word when I was a child in Japan, but I forgot what that
means.  I can not find the reference today.... May be it means oil
filled capacitor...

This Suzuki Musen still exist as a mom and pa electronics store. They no
longer manufactures anything. They just sell consumer electronics.
 

Click on the image title or on the image itself to open the full-sized image in a separate window.

Description Comment  
TX-88, chassis pulled

  

W8SAJ Builds the New Noveau

Jeff provides N-75A assembly pictures
Category: Friends
I just got the newer updated version of the Noveau N-75A done and works great as the first one. The new board now has the older AGC external board incorporated now with surface mounted parts on the new board. Everything else is the same it seems and performs the same. I did add a power switch across the one on the back, so I can turn on and off from the front panel.73, Jeff / WA8SAJ...  READ MORE
- Bradley Stone (stonebs),  04/19/2020 
   Just finished my first W9RAN Versa-TR Switch from Hayseed Hamfest and I put into a BUD box (tight fit).       I am using it with the Noveau-75 and my SDR-Play receiver & laptop, plus other receivers in a multi-coupler system I have here. The Noveau-75 now goes through the relay box and only the SDR and other receivers are used. The Noveau-75 receiver is "NOT&...  READ MORE
- Bradley Stone (stonebs),  02/09/2020 
   Above is a picture of my latest project.  After doing the transceiver thing, with a CE20A, mated to a SX-115, then the next transceiver project, a 10A mated to any Drake R4 series receiver, I had an idea.  Those transceiver projects have a lot of oscillators, and even the crystal oscillators can drift as they warm up, which requires re-zeroing the transmitter to the receiver from time to...  READ MORE
- Bradley Stone (stonebs),  10/27/2019 
  

Remembering Mike, N8ECR (SK)

Tributes and pictures submitted by net membership
Category: Friends
If you have some pictures or a small tribute you'd like to submit in memory of our former net control, please send them to brad@nb9m.com or W8TOW.dx-60.net for inclusion here.Here is Mike N8ECR at the QTH of Ron/K8FG. Mike N8ECR stopped  by with his new dog, the pic was taken on 06-29-2011.Mike and Ron N8UUH would head over to my area (14mi SW of Tawas City) so we could enjoy a lunch at H...  READ MORE
- Bradley Stone (stonebs),  12/24/2018 
   *** The PDF is Downloadable below ***Thanks to Mike, W5KRL, for making a good copy of a DX-60 Assembly Manual....  READ MORE
- Bradley Stone (stonebs),  12/08/2018 
   *** The PDF is Downloadable below ***Thanks to Mike, W5RKL, for making a good copy of a DX-60B Assembly Manual....  READ MORE
- Bradley Stone (stonebs),  12/08/2018 
   *** The .PDF file is downloadable below ***There are lots of mods for the Heathkit DX60 on the internet. These include audio and PTT mods. The PTT mods address an issue with the function switch and makes switching between RX and TX more flexible. The Function wafer switch on an unmodified DX60 switches the high voltage secondary of the power transformer when going from standby (receive) to transmi...  READ MORE
- Bradley Stone (stonebs),  12/08/2018 
   *** The PDF is Downloadable below ***Very crisp, legible, printable schematic.  Original link: https://www.nostalgickitscentral.com/heath/schematics/heathkit_schema_dx60b.pdf ...  READ MORE
- Bradley Stone (stonebs),  12/08/2018 
   ** The .PDF file is downloadable below ***One of the biggest short comings of the DX-60 is the function switch, and the need to switch the phone operation to Push-To-Talk (PTT), which should enhance the operation and save the function switch. I also wound up using a D-104 unamplified microphone with my DX-60B. Parts List: 1 – Two pin Microphone connector 2 – 6 or 12 VDC 4PDT Relay (If ...  READ MORE
- Bradley Stone (stonebs),  12/08/2018 

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W8SAJ Builds the New Noveau

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