Ham International la-120 Amp. schematic

[19ac728]

Hello ,
I looking for a schematic for the ham la-120 amp.
I have probs with de swr between trx and the amp.(1.25)
The amp was nos , but whit wat other probs that ik have fix already .
Its using 2 2sc2290 and a rx ampli.
Ik have searche for the schematic , but i can not find anything about it.
73

[bobby4244]

Hi Michiel. Did you try ham-international.co.uk ? Rick may be able to help you when he returns. He is a wizz I serched and also could not find much on this. What problems are you having with it? Please give more information. SWR of 1.25 doesn't seem bad? Ak da libra Augustine! I can speak German if you wish.

[19ac728]

Hi Bobby .
I dont try ham-international.co.uk yet.
Probably the best chance to get the schematic .

The swr between radio en amp is half way in red .(1.25) Hi stand
Whem te amp is switch of the swr are 1.1.4 , that is good .
Ik have 3 stands of output power low-mid and hi.
In the mid stand the swr is olso good 1.1.5 .
Strange in the low stand it was olso bad 1.20 .

My first inpresion was the lo-mid-hi that goes wrong .
but in the hi stand its bypassing the reducer, and i can not set it whit the adjustable cap on the amp print .

First i contact ham uk for the schematic .
Thanks for that .

Sorry for my bad english , but my german is a lot terrible

[bobby4244]

Ack Da Libra Augustine! How you making out? Fill us in. Sprecken Doytch

[warf135]

Surely you should put SWR meter AFTER the amp and not before? if you put SWR meter between amp and radio you will get false readings.

[19ac728]

That is true.
But my radio would like to see 50 ohms.
If the swr is bad between radio and amplifier can again cause damage or interference.
So far no solution found.