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just joined, need assistance with a deaf Syncal 30

 

Hi:
I had working Syncal 30 TRA 931 sitting on my bookshelf for about 10 years.
I decided to check it last week. I believe it transmits fine, but the rx is completely deaf. It has white noise but
otherwise completely deaf. Can anyone point me to any trouble shooting hints ?
If I remember correctly when I got the radio the tx/rx relay was flakey but a little tweaking and it was fine.
I already checked all 4 SPDT sets of contacts, and they seem to be working fine.
P
Re: Syncal 30 Battery cell replacement NiMH Lithium-ion batteries ?

 

Could go that way , the extra capacity and weight saving from the?
New technology cell's,? is worth taking advantage of ,?
That and the much flatter discharge curve , adds to the
Usability , much shorter recharge time as well?

Tnx? G
Re: Syncal 30 Battery cell replacement NiMH Lithium-ion batteries ?

 

¿ªÔÆÌåÓý

I have a few ebay batteries, all nicad , all boxed and all work ok!

Robin?
G?GNE

On 11 Mar 2020, at 00:07, Graham <g0nbd@...> wrote:

?Yes, that power/size/weight ratio is persuasive , but, the downside, may be emc issues from the battery management?
Not insurmountable,? but, you likely end up , with a novel solution , more art for art sake , rather than practical?

There are quite a few nimh? 24v battery packs on ebay of various , ratings,??
Disassembling one of those,? might be the simple option , as the cells will have?
Tag's and compatible chargers are also available ..?

Tnx? G
Re: Syncal 30 Battery cell replacement NiMH Lithium-ion batteries ?

 

Yes, that power/size/weight ratio is persuasive , but, the downside, may be emc issues from the battery management?
Not insurmountable,? but, you likely end up , with a novel solution , more art for art sake , rather than practical?

There are quite a few nimh? 24v battery packs on ebay of various , ratings,??
Disassembling one of those,? might be the simple option , as the cells will have?
Tag's and compatible chargers are also available ..?

Tnx? G
Re: Syncal 30 Battery cell replacement NiMH Lithium-ion batteries ?

 

If you go the Li-ION route, don't forget proper battery management/protection and the different charging requirements. And please forgive me if you already know about these issues.

-Albert
KI4ORI
Racal prm 4051 (Squadcall2)

 

Gentlemen
Racal prm 4051 (Squadcall2)
I seek a service manual for above or schematic. Thank You J.Knott 2E0KNJ
Syncal 30 Battery cell replacement NiMH Lithium-ion batteries ?

 

Syncal 30? Battery cell? replacement??

Any? suggestions as to? suitable? cell? replacements? for the? original? ni-cad?
cell? units ,???NiMH? ?Lithium-ion batteries ?

Interestingly,? with? time, the? price of? ??Lithium-ion?, appears?to? of dropped?
to the? point .? its a? viable option , ebay -? 12v 20,000 mAH? ~ ?20 delivered ?
battery size/weight? ?is also? quite small? compared to the? original?

Might need a? lot of packing? in the? battery? box , probably room for? , two sets? !

73-Graham?
Re: Syncal 30 , fails to return to RX

 

Usual crazy faults , this was the only open frame relay? , contact's Rx 12v? switched supply,? 12v on set power on?
zero during tx,? returning to? 2 v? on Rx ....... power set off , on , back to 12v on Rx ,?

Cleaned contacts , normal service restored .... For now?

G
Re: Syncal 30 , fails to return to RX

 

Relay part number ?

Ive? qty 3? relays? in the? set, one? on the? relay board? and two? on the? main? analog tx/rx signal? board
the only? identification? on the? realys? is??

National? RS? 12V? ?and 611? ....Im seeing data? sheets for? RS-12V??
?Electromechanical Relay, SPDT, Latched, 28VDC (Coil),

Assume the? 611? ?is a? batch number ,? looks? to? of been? added to the relay?
at 90 deg? to the? main label?

Latched relay ,? possible cause of it holding in , due to? age? I wonder ?

Are these the? common fault items ??

Tnx - Graham?
Re: Syncal 30 , fails to return to RX

 

It sounds like the classic problem that I have fixed on many occasions, namely failing transistors.

I have found many of the transistors used to perform logic functions and switching the relays seem to fail with strange faults. Clearly they had a bad batch!

?

M0GXB
Re: Syncal 30 , fails to return to RX

 

Sticking, or the? driver? transistor , leaking ? ,?

Powering the? set off? and? back on clears the? fault ,? may be? , held in ? , just hope the? fault? remains till? its identified ..?
guess ,? identifying ,? what is? switching the? RX audio? would be a good? place to? start ..

Had some? fun and game's? with? one of the? ?counter? re-set line , ztx? clamp? transistors ,? not? pulling to ''zero ish'' , staying up slightly .. causing? a pulsed? ?400? hz? fm? some time? back and the? last? /2? ?in the? pll ref line failed , doubling the? ref? frequency? ..novel?

Tnx-G
Re: Syncal 30 , fails to return to RX

 

Racal Syncal 30's are notourious for sticking relays, try to get your relay cleaned with switch cleaner

Stuart
PA/G0TBI/P Den Haag



-----Original Message-----
From: Graham <g0nbd@...>
To: RacalRadio <[email protected]>
Sent: Wed, 5 Feb 2020 22:52
Subject: [RacalRadio] Syncal 30 , fails to return to RX

Syncal 30 , fails to? return to RX

Started as? intermittent fault and is now? permanent , a plus point? , I suppose?

Basically , TX and? Rx? are ok,? all? modes ,? the? problem is ,? once? TX has been? engaged ,??
on releasing the? PTT , the? set? returns to? RX , meter? shows the? battery? voltage? and there? is?
slight? ?noise from the? head set??

But , the? RX is? actually? NOT working ,?

Rx can be? recovered , by? powering? the? radio? OFF and? back ON ,? ?
where? there? is? a? couple? of? beeps? from the? synth? lock ind , then? it works?
normally ,?

Not taken the? covers of? yet,? looking? to see? if this? fault is? a ''known''? ?condition
and / or? any? pointers as? to? possible? cause ...?

Initially? double? clicking the? ptt could? remove the? fault ,??

Rx audio? , during tx is? ?switched ??

Tnx - Graham?
g0nbd

Syncal 30 , fails to return to RX

 

Syncal 30 , fails to? return to RX

Started as? intermittent fault and is now? permanent , a plus point? , I suppose?

Basically , TX and? Rx? are ok,? all? modes ,? the? problem is ,? once? TX has been? engaged ,??
on releasing the? PTT , the? set? returns to? RX , meter? shows the? battery? voltage? and there? is?
slight? ?noise from the? head set??

But , the? RX is? actually? NOT working ,?

Rx can be? recovered , by? powering? the? radio? OFF and? back ON ,? ?
where? there? is? a? couple? of? beeps? from the? synth? lock ind , then? it works?
normally ,?

Not taken the? covers of? yet,? looking? to see? if this? fault is? a ''known''? ?condition
and / or? any? pointers as? to? possible? cause ...?

Initially? double? clicking the? ptt could? remove the? fault ,??

Rx audio? , during tx is? ?switched ??

Tnx - Graham?
g0nbd
Re: VRQ-319 Power Connector

 

I found the correct cable from LR Series.? I just had to dig a little and use the correct search criteria.



Now I'm in search of...
Wire Antenna Adapter -?
The "correct" dog bone connector that connects the BCC-319B to the BCC-589B -?
MA654 Dipole Antenna Kit
Control Panel Extension Cable -?49270-010-10

73,
Carl
NQ3U
RACAL RA17 MK2 RECEIVER FOR SALE

 

Hi All

Very nice Racal RA17 MK2 For sale.

Very nice condition inside and out for its age and fully working Its the MK2? serial numbers etc can be seen on the pictures.

Collection from Devon and a fair price of ?395

If you would like any more pictures please let me know Many thanks?
Re: VRQ-319 Power Connector

 

Dom,
Thanks.? The one in the photo I'm holding, the smaller one that doesn't fit, came from LR Series :)

Maybe I ordered the wrong connector?

73,
Carl
NQ3U
Re: VRQ-319 Power Connector

 

?has them if thats any help, also listed with all the socket details if you want to try and find some yourself.
Re: Stunning RACAL RA17 FOR SALE

 

As I said I will forward full details and pictures very soon

There is no need for Caution as It will be collection only so you would not part with any money
until you have seen It.

Sorry if any rules have been broken.


On Thursday, 30 January 2020, 22:24:41 GMT, Graham Taylor via Groups.Io <grahamtaylor301@...> wrote:


Caution. This guy just joint the group minutes ago. It's customary to list your location and terms. KB0SFP.
----------

Hi All?

I have a Stunning RA17 FOR SALE Will forward details and Pictures very soon

Thanks

Stunning RACAL RA17 FOR SALE

 

Caution. This guy just joint the group minutes ago. It's customary to list your location and terms. KB0SFP.
----------

Hi All?

I have a Stunning RA17 FOR SALE Will forward details and Pictures very soon

Thanks
VRQ-319 Power Connector

 
Edited

All,
I'm searching for a power connector for a VRQ-319.? It is very similar to the regular Clansman power connector with same pin orientation and polarity, but the connection on the VRQ-319 is a bit larger in diameter. Does anyone know where I can get one?? The manual I have states it's a "2 pole plug, N orientation, shell size 14."? The male connector on has the text "TEE PT0214 02P 9203" on it.? Cell phone photo attached.
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