EMRFD Message Archive 13017

Message Date From Subject
13017 2016-07-15 09:41:04 kf8zn TCA 440

I recently happened upon a few of these IC's.


Anyone ever built a radio around them?


Mike AC2Q

13018 2016-07-15 10:05:27 blumu Re: TCA 440
A bit dated, but golddust in their time!
I built a German kit which worked well.
Circuits on the web, which would still
be "competitive" for CW and SSB.

Michael

(as gqrp posted)

On 15.07.16 17:03, kf8zn@yahoo.com [emrfd] wrote:

> I recently happened upon a few of these IC's.
> Anyone ever built a radio around them?
> Mike AC2Q
13019 2016-07-15 13:30:54 Sandeep Lohia Re: TCA 440
looked for them a couple of times in my local market here in India but
didn't find any...

--
Please encourage recycling, reuse or repairing of E-waste.
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13021 2016-07-16 06:52:21 i7swx Re: TCA 440
Hi all,

the TCA440 was a very interesting chip in the 70s and 80s. It was not too much know as the SA602 became later. Also, was not easy to purchase as Siemens ICs were not well distributed.

I asked a ham friend in Germany to buy one for me and it was expensive too. I was wanting to build a Noise Blanker receiver as published by Ulrich Rohde, at that time DJ2LR, now N1UL. Ulrich published a Noise Blanker specific receiver, tuned on 40 or 50MHz, to be added to a receiver, the article was on QEX, QST or Ham Radio in the 70s.
I believe the TCA440 could outperform the SA602 ... someone with some of these ICs could try a circuit and see if I am right or wrong. In case I am wrong I will pay for one italian espresso coffee with straws ...

73

Gian
I7SWX
13022 2016-07-16 07:59:59 blumu Re: TCA 440
I have a folder with TCA 440 implementations...
Without having checked current online availability,
I suggest searching the following:-

HRX 80
DK1HE Miss Moskita
DK1HE-Monoband-TRX "Sparrow" (qrpproject.de)
HB9BWY (Sprat 102)
RadCom 12/83 ; 06/91 ; 05/80
cq-DL 8/80 p 380 ; 12/82 P586 et al
www.kolumbus.fi/oh2aun/tca150.gif
Silicium Microelectronic Integration GMbH, edition 12/95

Hopefully, you will find something useful!

If needed, I could scan and email some schematics to
someone canny enough to upload them to the group...

Michael
UK
ex 9Q5TS


On 16.07.16 14:52, i7swx@yahoo.com [emrfd] wrote:
> Hi all,
>
> the TCA440 was a very interesting chip in the 70s and 80s. It was not
> too much know as the SA602 became later. Also, was not easy to purchase
> as Siemens ICs were not well distributed.
>
> I asked a ham friend in Germany to buy one for me and it was expensive
> too. I was wanting to build a Noise Blanker receiver as published by
> Ulrich Rohde, at that time DJ2LR, now N1UL. Ulrich published a Noise
> Blanker specific receiver, tuned on 40 or 50MHz, to be added to a
> receiver, the article was on QEX, QST or Ham Radio in the 70s.
> I believe the TCA440 could outperform the SA602 ... someone with some of
> these ICs could try a circuit and see if I am right or wrong. In case I
> am wrong I will pay for one italian espresso coffee with straws ...
>
> 73
>
> Gian
> I7SWX
13023 2016-07-16 09:39:48 Jochens Feldhaar Re: TCA 440
Hi,
I have 35 of the TCA 440 NOS here in Germany - bought the stock of an
electronics store some years ago. Interested in some?

73 de Jochen DH6FAZ

Am 16.07.2016 um 15:52 schrieb i7swx@yahoo.com [emrfd]:
>
>
> Hi all,
>
> the TCA440 was a very interesting chip in the 70s and 80s. It was not
> too much know as the SA602 became later. Also, was not easy to purchase
> as Siemens ICs were not well distributed.
>
> I asked a ham friend in Germany to buy one for me and it was expensive
> too. I was wanting to build a Noise Blanker receiver as published by
> Ulrich Rohde, at that time DJ2LR, now N1UL. Ulrich published a Noise
> Blanker specific receiver, tuned on 40 or 50MHz, to be added to a
> receiver, the article was on QEX, QST or Ham Radio in the 70s.
> I believe the TCA440 could outperform the SA602 ... someone with some of
> these ICs could try a circuit and see if I am right or wrong. In case I
> am wrong I will pay for one italian espresso coffee with straws ...
>
> 73
>
> Gian
> I7SWX
>
>
13024 2016-07-16 11:25:06 Ashhar Farhan Re: TCA 440
Our love for the TCA440, the SL64x series or the CA3028 stemmed from the few found fascination with ICs in the 70s. It is remarkable that what constitutes the better receiver design now, uses the components that were available even in the 70s. It was just that our understanding of what constitutes good design, proper test instrumentation and the availability of simulation software hampered these discoveries.
There was nothing to prevent an R2Pro from being built in the 70s. All the maths and the devices are of the 70s vintage. Yet, we now see the designs in a new light.

- f

13025 2016-07-17 06:27:36 kb1gmx Re: TCA 440
Oddly when you look at radios like on 1970s TenTecs you see those parts and a bit of creative design.
Engineers have been modeling for longer than cheap computers.  It might have been hours with paper
and math and maybe a slide rule but numbers did the talking, the engineer had to interpret them.

I have a huge supply of old parts, I use them as newer rarely offer flexibility or any significant 
improvement at HF.  That and the older parts are not as committed to a design of an entire thing.

Example, when I first saw the Elecraft K2 I saw 1970s keep selectivity close to the antenna as possible
and the Progressive RX.  However one idea was a twist, the AGC was derived from a down conversion 
from IF at 4.mumble to 150khz (sa602, Opamps, diodes) cool.  But to try it out I pulled out a old National
AM RX subsection IC that did conversion, IF and detection and also provided AGC out.  One part and 
it made a good solution.  Now there are dozens of different parts that could do that its the application
we can be more creative with.  

As to the R2, the first article I'd seen of a phasing RX (solid state) was in the 60s.  Another was the 
article by Breed (Anew breed of receiver).  Ham radio had in the 70s a Phasing rig that featured a 
digital 90 degree source.  What did happen is in the later 70s parts seemed to have taken a major 
jump in quality and shrink in size, I attribute that to the needs of computer industry and radio driving
quality and quantity.


Allison
13026 2016-07-17 09:57:42 kf8zn Re: TCA 440
email them to me and I will get it done!!

Mike AC2Q
13027 2016-07-17 10:50:44 Cecil Bayona Re: TCA 440
All this recent discussions on the TCA440 radio chip gets ones creative juices going, the device looks useful so I ended buying 10 of them for personal use. Now to design a simple 40M receiver and check them out.

13028 2016-07-17 13:51:10 markusl700 Re: TCA 440
Hello all!
The TCA 440 is still aviable at FUNKAMATEUR OnlineShop ! The East-German pedant is named: A244 ! (buildt in the 1980's) Hope 2 help you, ...
73 de db9pz, Markus

Hallo OMer der TCA 440 ist als A244 immer noch beim FUNKAMATEUR OnlineShop verkriegbar! (Alte RFT Teile aus den 80ern, aber "Baugleich")
Hoffe Ihr kommt so weiter,...
MfG es 73 de Markus, db9pz

  

13029 2016-07-17 15:46:32 markusl700 Re: TCA 440
Try it a second time:

Hello Old Man/ YL's!
The TCA440 is still avaiable at:
FUNKAMATEUR OnlineShop

The have the East-German pedant: A224 
(buildt in the 1980's! )
Hope to help you!
73 de Markus db9pz
___________________________________

Ich versuche es noch einmal:

Hallo liebe OMer/YLs!
Der TCA440 Ist als A224 bei:
FUNKAMATEUR OnlineShop
immer noch zu haben! (das sind alte RFT-Teile aus den 80ern, aber "Baugleich" !)
73 de Markus db9pz